Singer-songwriter-nondoctor Tony Rogers is back with his self-help tunefest. Singing songs, spouting slogans, and making plentiful Gen-X references (I counted 29--that's one every 3.1 minutes), Dr. Tony demystifies the Mars/Venus divide and pontificates that one is, in fact, the loneliest number. (Look what happened when David Lee Roth went solo--not pretty.) No passive affair, the evening calls for honest disclosure--audience members fill out preshow questionnaires, from which Rogers reads aloud and names names--and "full-assed" singing along. Those who attended last fall will find the show much the same, though there are a few new visual aids. Light and a little goofy, Pop Psychology is a better showcase for Rogers's melodious, sardonic songwriting--well-known to fans of his band, the Good--than for his therapeutic or comic instincts. "Piano masseuse" Steve Kouba accompanies and offers cute sidekickery as one of Dr. Tony's converts. Davenport's Piano Bar & Cabaret, 1383 N. Milwaukee, 773-278-1830. Through March 1: Saturdays, 7:30 PM. $13 (plus a two-drink minimum).