I've been playing in and around LA for about 2 months. The Bicycle is the nicest IMO but the rake is ridiculous given the stakes (they take $5 for any post-flop hand regardless of pot size and the buy-ins are restricted to 20x and 40xBB). However, you get free food and the service is good.
Commerce has good action but it is like a meat market and they have the restricted buy-in too. Rake is better though.
The Hustler is a nice casino but it is in the middle of the ghetto and the crowd has too many "thugs" for me.
My favorite so far has been the Morongo but it's closer to Palm Springs. Rake is reasonable, nice poker room, no restricted buy-ins, and it's one of the few 18 and under casinos so there is more action.
Pretty much all the casinos out there have daily tournaments. However, unless you drop $250+ they are donk fests for the most part. The casinos encourage buy-ins and set the levels to go up quickly to get them over as fast as possible. Last one I was in I was chip leader at my table, and added on during the break. After the first break I didn't even have 10x BB.
There are a lot of casinos out there, go to the poker atlas to see which ones are around where you're going and have tourneys you'll want to play.