Somerville’s BANDITAS throw a party tonight in Union Square as they blast out of town to show the rest of the country what is up with them. Their sweet, harmony laden sound seems to have curdled a bit and taken a trip through the garage rock vortex, but it still has its hooks in us. Joining the party are western MA rockers BUNNY’S A SWINE, and local hip hop party people CATHY CATHODIC and BIG DIGITS. Always a good time in Union Square. 9pm 21+