The games I run here are on an oval dining-room table with a 3'x4' chalkboard elevated about 10" above it on little stands...we play on the board and keep character sheets, food, beer, etc. on the table under it. I DM from a couple of little folding tables off one end of the main table; the board takes up too much room for my screen to fit on there as well. Behind me is a bookshelf with far too many minis on it, along with various books, modules, etc. The kitchen is literally within arm's reach of at least one player.
The game I play in runs on a rec-room pool table with a ping-pong table on top of it (with the net removed, natch) - it's big enough that sometimes I need a foghorn for the DM to hear me (I sit at the far end). It's a self-comtained area; there's a beer fridge, sink, kettle for tea, etc. all right there.
Lanefan