I use 4' x 2' folding tables from The Folding Table company in the UK. I bought 6 of them.
They can be configured as 4' x 4' with 2 tables, 6' x 4' with 3 tables. 8'x 4' with 4 tables and 8' x 6'with all 6 tables.
I also have 6 x 5' x 2' pieces of 9mm MDF and could set up a 12' x 5' table (just in the space) but usually only use a 6' x 5' or 8' x 5' (also my wife has "nicked" 2 of the tables to use...).
The tables and MDf pieces go against the wall in the next door study when not in use.
This gives the flexibility to take down all the tables and use the games room for something else - we have had band rehearsals in it and a large New Years dinner.
The tables have the slight disadvantage, like all folding tables, that the ends are harder to sit at as you can't put your legs under the ends but they work well.
6' x 5' combination set up:
