Want to do something different rather than going to a bar or see another tourist "hot spot"? The Groundlings is a world famous improv comedy troupe/school that has nightly public shows. The theater is located on Melrose Ave. in a trendy shopping and dining area. A ticket can run from $10-$25 (sign up on goldstar.com for cheaper prices). Many famous comedians such as Will Ferrel have performed here. The small theater provides a fun experience in which the crowd is fully engaged.
The Groundlings: http://www.groundlings.com/
Other Famous LA Comedy Venues:
Comedy Store On Sunset: http://thecomedystore.com/index.cfm
LA Improv: http://hollywood.improv.com/
Laugh Factory: http://www.laughfactory.com/