Checkout a Lakers or Clippers game at the Staples Center. There's a lot to do down there and tickets are pretty reasonable on stubhub.com (there's even a stubhub office across from Staples). I went last Sunday for a Lakers game and Monday for a Clippers game. There's also some restaurants down there, Yard House, etc. if you're into beer and aren't driving.
In Chicago Bulls games are outrageously expensive because people are crazy for basketball here. In Los Angeles, Lakers tickets are super cheap right now because they suck and Clippers tickets are cheap because nobody in LA cares about the Clips. I sat in a luxury box both night for $125 & $105 respectively. Saw the Clips win when Kevin Love missed that tip in Monday night.