For many, bingo evokes images of elderly ladies sitting in a church basement, earnestly scanning a series of cardboard sheets in search of the one number that will earn them a meager jackpot. Bingo on this scale remains a staple fund-raiser for charitable and civic organizations. But, increasingly, today's commercial bingo halls are becoming full-service, high-stakes operations, offering a much faster pace, a much wider variety of games, and, of course, enormous jackpots for their loyal players.