How many events have you attended as the only white person?
How comfortable did you feel?
Do you think your merit was accurately reflected at these events?
The Meetup events that I attend (in NYC which is very multicultural) has people of all skin colors, not just white people. Lots of Indians, lots of Asians, just all sorts of colors, so it is not like one black among whites.
At any rate, if blacks want to advance technically and get jobs, going to Meetups and connecting with others is a good way to do it. All these "diversity" initiatives are the wrong way to do it.