Graveyard bowling!! A dollar per game, per shoe rental, and per beer. Are you serious?
My friends and I came here on a Thursday night, and bowled/hung out for about 4 hours straight (until 4am!). We've done this before, and it's always a great start to a fun Vegas weekend.
It doesn't get too crowded here, which gives you and your friends plenty of space to get crazy.
Have fun!!