For the left-leaning rock fan, the "Unplug Bush" fund-raiser here on Tuesday offered plenty of chances to rage financially against the president's political machine. Concertgoers, who paid $50 to hear acoustic sets by a string of politically minded musicians, could also spend money on paraphernalia like Redefeat Bush condoms ($3) and baby outfits emblazoned with the word "vote'' ($25). The event, organized to raise money for Democratic voter registration, generated $4,000 in revenue, according to the Committee to Redefeat the President, the political action committee that staged the concert. About 200 attended, though organizers said they had hoped for 300...