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An article of furniture has a main body, a floor-engagement frame, a plurality of non-rolling floor-engagement members connected to the floor-engagement frame, and a plurality of rollers that are also connected to the floor-engagement frame. These rollers do not engage the floor when the article of

An article of furniture has a main body, a floor-engagement frame, a plurality of non-rolling floor-engagement members connected to the floor-engagement frame, and a plurality of rollers that are also connected to the floor-engagement frame. These rollers do not engage the floor when the article of furniture rests upon the floor in an ordinary state of usage but do engage the floor when the article of furniture is tilted at least fifteen degrees. The article can further comprise a pedestal that pivotally couples to the floor-engagement frame and that supports a table surface. A user interface can control a latch that holds the table surface perpendicular to the pedestal. Another user interface can control a latch that holds the table surface at a present vertical height when latched.

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1. An apparatus comprising: an article of furniture, comprising:a main body;a floor-engagement frame having a central portion attached to the main body;a plurality of non-rolling floor-engagement members connected to a floor-side surface of the floor-engagement frame and configured to engage a floor

1. An apparatus comprising: an article of furniture, comprising:a main body;a floor-engagement frame having a central portion attached to the main body;a plurality of non-rolling floor-engagement members connected to a floor-side surface of the floor-engagement frame and configured to engage a floor when the article of furniture rests upon the floor in an ordinary state of usage wherein each of the non-rolling floor-engagement members is radially outward of the central portion;a plurality of rollers connected to the floor-side surface of the floor-engagement frame radially outwardly of the plurality of non-rolling floor-engagement members and configured to not engage the floor when the article of furniture rests upon the floor in the ordinary state of usage, wherein the plurality of rollers are spatially discrete with respect to the plurality of non-rolling floor-engagement members and hence not spatially intermingled with any of the non-rolling floor-engagement members; and wherein each of the non-rolling floor engagement members is spaced radially inwardly from an innermost portion of one of the rollers;such that when the floor-engagement frame tilts by at least fifteen degrees towards a moving state of usage, the plurality of rollers engage the floor and the non-rolling floor-engagement members disengage from the floor to permit rolling movement of the article of furniture. 2. The apparatus of claim 1 wherein at least some of the plurality of non-rolling floor-engagement members comprise leveling glides. 3. The apparatus of claim 1 wherein at least some of the plurality of rollers comprise casters. 4. The apparatus of claim 1 wherein each of the rollers is disposed proximal to a corresponding one of the non-rolling floor-engagement members. 5. The apparatus of claim 1 wherein the floor-engagement frame comprises four beams, wherein each of the beams is disposed perpendicular to both adjacent beams and has an outermost end, and wherein the non-rolling floor-engagement members and the rollers are disposed proximal to the outermost end of corresponding beams. 6. The apparatus of claim 1 wherein the article of furniture comprises a table. 7. The apparatus of claim 6 wherein the main body comprises: a pedestal that couples to the floor-engagement frame;a table surface that couples to the pedestal. 8. The apparatus of claim 7 wherein the table surface is pivotally coupled to the pedestal. 9. The apparatus of claim 8 further comprising: a user interface coupled to an underside surface of the table surface;a latch responsive to the user interface, the latch having a latched state that holds the table surface in a perpendicular orientation with respect to the pedestal and an unlatched state that permits the table surface to move to a parallel orientation with respect to the pedestal;such that a user can selectively move the table surface from the perpendicular orientation to the parallel orientation by employing the user interface to unlatch the latch. 10. The apparatus of claim 9 wherein the user interface is disposed proximal to a particular corner of the table surface. 11. The apparatus of claim 10 wherein the floor-engagement frame has a visually-discernable image disposed thereon beneath the particular corner of the table surface to thereby signal to a user a present location of the user interface. 12. The apparatus of claim 11 wherein the floor-engagement frame comprises four beams, wherein each of the beams is disposed perpendicular to both adjacent beams and has an outermost end, and wherein the visually-discernable image is disposed at one of the outermost ends. 13. The apparatus of claim 7 further comprising: a user interface coupled to an underside surface of the table surface;a latch responsive to the user interface, the latch having a latched state that holds the table surface at a present vertical height and an unlatched state that permits the table surface to be selectively moved to a different vertical height;such that a user can selectively move the table surface to different vertical heights by employing the user interface to unlatch the latch. 14. The apparatus of claim 13 further comprising: a biasing member configured to urge the table surface upwardly and away from the floor-engagement frame. 15. The apparatus of claim 14 wherein the biasing member comprises, at least in part, a pneumatic biasing member. 16. The apparatus of claim 13 wherein the user interface is disposed proximal to a particular corner of the table surface. 17. The apparatus of claim 16 wherein the floor-engagement frame has a visually-discernable image disposed thereon beneath the particular corner of the table surface to thereby signal to a user a present location of the user interface. 18. The apparatus of claim 17 wherein the floor-engagement frame comprises four beams, wherein each of the beams is disposed perpendicular to both adjacent beams and has an outermost end, and wherein the visually-discernable image is disposed at one of the outermost ends. 19. The apparatus of claim 7, wherein the table surface has a rounded-edge periphery. 20. The apparatus of claim 19 wherein the rounded-edge periphery includes both a rounded upper edge and a rounded lower edge.