Are you looking for more hustle rides or chill social rides? You can also check out LAfixed and Midnight Ridazz. There are weekly rides around, but I don't know anything about Pasadena. You can try out the LA river bike path or San Gabriel River trail

Wolfpack Hustle will be an awesome experience. Riders from all over the city do it, so you can get a lot of info from the people there. One of the original guys of Midnight Ridazz does Wolfpack, he goes by Roadblock.