I've never felt like race was a big issue in my local startup community. There are plenty of black, brown, olive, tan, yellow, and peach individuals sprinkled throughout in most events I attend here in Houston.
Sometimes it would be nice to connect with them just we share that kind of commonality, but I always felt that creating a "black startup" meeting group would be extremely cheesy and too inclusive.
I don't care what color they are as long as they come up with good ideas and do what they say they will do.
That being said...markets are markets and if you have some cultural or ethnic insight into an opportunity for a business or a way to help your specific community; you should count yourself lucky for being born whatever you are and try to capitalize on it.
Theres no reason the team you build has to be racially ?inclusive/exclusive?, and actually the aforementioned diversity actually helps strengthen teams in my opinion by providing those different cultural or ethnic perspectives.