Hang in There, Baby Instead of punishing Andrew Lloyd Webber for creating the maudlin and inescapable monster anthem "Memory," audiences continue to reward him by making Cats the longest continuously touring musical in American theater history. The tally so far: four tours, 17 years and 11 months onstage, over $2.2 billion grossed worldwide, and hundreds of recordings of "Memory," ranging from the Boston Pops version to a techno interpretation by European singer Natalie Grant. The musical, based on T.S. Eliot's Old Possum's Book of Practical Cats, has won Tony Awards for best everything and must, by extension, hold the record for T-shirt sales. The show begins at 8 p.m. (and continues through Oct. 12) at the Golden Gate Theater, 1 Taylor (at Market), S.F. Admission is $36-67; call 776-1999. The production holds auditions for both Broadway and the touring company Oct. 3 at 9 a.m. for men, 1 p.m. for women, at the San Francisco Dance Center, 50 Oak (at Van Ness), Fourth Floor, S.F. Dancers aged 17-32 should arrive warmed up, wearing flat shoes, and prepared to sing an uptempo song and a ballad.