This city is being overrun by Mexicans. No, it’s not a Republican’s worst nightmare, we’re talking about the restaurant and bar scene. Mission Cantina, like Barrio Cantina just around the corner, is yet another recent Mexican concept rebranding. Opening up shop in the space formerly occupied by Beacon Street Tavern, the new restaurant has retained the same ownership and much of it’s former staff. However, the ambience of the formerly moody, markedly dim bistro has brightened considerably — that is, if you count the Dia de los Muertos skull imagery throughout as bright.