I've lived in LA for 8 years and have been to all the Groundlings shows multiple times. I've seen maybe two bad shows. This is a must see for anyone visiting or for locals. You get to see aspiring comic actors working hard to make a name for themselves. The list of alumni is impressive and a testament to the quality work they put out. If you watched the 2012 Oscars you might know that Groundlings alumni and current cast members did very well with Oscar nominations and one victory for adapted screenplay. In a nutshell, Wed and Thurs are improv shows. I like the long form (30 minutes per improv "scene") on Wed, but Thurs. is good too. The actors are very smart and quick on their feet. You will be amazed and laugh out loud. Friday and Saturday nights are largely SNL-style skits with some improv. All very good shows and many cast members are regularly in popular TV shows and movies. Sunday, I've actually not seen as I believe this is the junior varsity version of Groundlings. Grab some friends or go solo and enjoy!