Quoted from IdahoRealtor:^This. Cool decor to set the mood. $1000-$2000?
Mini fridge and/or bar $500
Generic sound system $500
1 multicade arcade such as Arcade Legends or Ultimate Arcade $1000 (used)
3-4 $2k-ish pins
Comfy old sofa Free on Craiglist
Unless you've got a massive space I'd advise against a pool table. I had one once and it only got played when I had company over. Plus it required enough open space for a whole pin collection (about 12' x 16')
I got a sofa once for a pack of cigarettes. It had mites. I won't make that mistake again lol.