There's chamber music to provide an oasis in the summer's performing arts desert this week. At 8 tonight, new string quartets by members of the Tampa Bay Composers' Forum - Peter Blauvelt, Matthew Fields, J-C. Kilbourne, Myra Lin and Cory Stall - are on the agenda at the Palladium Theater in St. Petersburg. Tickets: $8, $10. (727) 822-3590. Amy Schwartz Moretti, above, concertmaster of the Florida Orchestra, is presiding as artistic director over the first chamber music workshop of Bay Area Music at the Mahaffey Theater at Bayfront Center in St. Petersburg this week. Students and faculty members give a final concert, free and open to the public, at 7 p.m. Friday in Mahaffey's Sun Pavilion Room.
