At French Connection on Boston's fashionable Newberry Street this past Tuesday evening, L.A. native Lindsey Berman is juggling. A song by the band Journey blares out of her satchel shaped like a guitar each time her cell phone rings. People are calling -- friends, friends of friends, friends of friends of friends. Everyone wants a ticket to the Black Eyed Peas concert that evening, the hot after-party sponsored by the organization Rock the Vote at the Democratic National Convention. Inside French Connection, vendors are hawking their black T-shirts that read, "FCUK you! I'm voting," referring to the brand French Connection United Kingdom. Art Alexakis, the lead singer of the pop band Everclear, is singing. Berman is making sure everything goes smoothly, firing up the volunteers on the street, and figuring out how she'll get credentials for young people so they can get on the floor for the convention's speeches that evening.