Then the 12 winning numbers, drawn from the numbers 1 to 80, appeared on the screen as yellow balls. They joked with the bartender while the clock counted down to the next drawing. On a recent weekday afternoon, regulars fed a stream of $10 and $20 bills to the clerk, Rita, in exchange for slips of paper printed with their numbers. Keno sales are so brisk that Duford keeps one clerk on duty just to dispense tickets.