CLASSICAL ACTION--Aside from their nostalgia (in entirely different directions) and their desire to please the audience, what do the romantic Joshua Bell and the almost rustic Mark O'Connor have in common as violinists? A hatred for the scourge of AIDS, which is why both will be performing at this benefit for Chicken Soup Brigade and the Northwest AIDS Foundation. This is the type of concert at which more attention is paid to the host (LILY TOMLIN) than the programming, so I have no idea from the press material what music will be performed. But the Symphony, the Seattle Men's Chorus, and the vocal stylings of Susanne Mentzer, Jubilant Sykes, and Betty Buckley are all being called upon, so if you go, expect a bag so mixed that no one will be wholly satisfied musically. Benaroya Hall, Taper Auditorium, Tues June 29, 7:30 pm, $35-$70, 292-ARTS.