You have time at lunch?
I don't know what your definition of cheap is.
I think a card table, without chairs, would be too high. If you got low coffee table at least people could sit on the couch, and on the rollaway beds, and on the floor, and either talk or play games.
Try Value Village...
I know at one point I bought a card table that came with four chairs...think it might have been thirty or forty bucks. If that's still possible, I dunno.
I think I *will* run to Value Village at lunch. I only get half an hour...but I can always stay fifteen minutes late if I hafta.
I have a feeling they won't have anything for a reasonable price. Seems like normally even coffee tables go for thirty bucks there.