Boo: the new curved safety pins work great too. I sometimes use the spray and then throw in a few safety pins also if its a big quilt. The spray stuff keeps it from slipping long enough to get 'er pinned. My table isn't that big--an oval unfortunately, and the floor too kills my knees. Brings back childhood memories of being punnished on my knees, probably for sassing, but don't really emember. But I remember how my knees hurt! :lol:
Like you said, if you use a table, start in the middle of the quilt and go from htere, when you are ready to do the sides, use the chairs to keep the rest of it off the floor.
Good luck