Gentrification implies you are going to make the community "nicer" by putting up some sort of she-she type of coffee shop that the locals can't afford to go to, therefore running them out of the community.
However, if the venue is both ok with the locals and serves as a spot they can attend and enjoy, then no that's not gentrification. Just don't exploit anyone of fuck anyone in the ass like a capitalist. I would recommend seeing if there are other buildings you can rent that are already part of the community...