Yes, there's definitely a decent amount of cosplayers/anime-nerds here in SD. Check out those things DBChan linked, I'm a regular of the Con Artists. There's actually a meetup this Sunday down in San Diego, I don't know if you have a car or not but there are a decent amount of people from Escondido area if you want to try to arrange a ride.
You can call me Jono
San Diego Comic-Con, Otakon, Dragon*Con