Voodoo Scooters is truly a full service shop: sales, repairs, maintenance, art gallery and an occasional all-ages rock venue. Scoots are rolled away to make room for amps, drums and music lovers. Sound spills outside, encouraging passersby who just ate at the nearby Frontier Restaurant to linger on the sidewalk. Monday’s show will either lure them in or chase ’em away. It doesn’t much matter, as the tiny place is sure to be packed.