Our local site for ride listings is: Login - Chasing Watts!. Most of the local group rides and events get listed here.
I live in Sugar Land, but shops in your area that I know are associated with racing include the following. If you reach out to them, they can either hook you up with group rides or recommend teams in the area.
http://shamacycles.com/ (Phillip Shama is the owner and rides all the time)