Playa Vista has a Masters Team. If you want to compete with us, first register with USMS http://www.usms.org/reg/ and select Playa Vista Swimming as your team. USMS membership is $50 a year. Each competition is usually $20-$30 to enter.
These meets are very low key and are a lot of fun. You are only swimming against people in your own age group. The age groups go up in 5 year increments. It also gives you a good point of reference to see how far you have come with your training.