How much money should i put on my card

There was 4 of us, and we spent $30. Had alot of fun, and was in and out in a little over an hour.

That really depends on how many games you want to play and how long you want to play. First time around go with something like $20, it's not too much, but not a tiny amount, and you can get good idea of how fast you go through your money there. You can always add more real easily if you want to keep playing.