So our pals in vitaminwater, who last month helped us present "OTD's most downloaded artist" BAD RABBITS with a giant flying-V guitar at the Best Music Poll party, is back in action right downstairs from Phoenix HQ. For the entire month they've taken over the Fourth Wall Gallery at 132 Brookline Ave., creating an interactive arts and music space out of a non-traditional venue, and tonight kick off the Music Mondays series that highlights some of the radder sounds from around the city and surrounding regions.