I’ve heard that Los Mariachis [http://www.yelp.com/biz/los-mariachis-mexican-restrnt-brooklyn] on Coney Island Ave has a live mariachi band on Friday nights, but I’ve never actually seen it. Thankfully, neighbor Rob Viola [http://statikluft.com/] has excellent video proof [https://twitter.com/statikluft/status/216346140415762433]!