SF Chanteuses The La Dee Da; Kay Kaplan; Jeff, on keys. 52nd **All Stars** Swing SF Jeff Orchard workshopped lounge act     IN THE SAN FRANCISCO TRADITION Jeff workshopped his lounge act in an alleyway club South of Market. The act, called the 52nd Street **All Stars,** evokes New York's legendary three-block stretch where nightly in the 1940s-1950s the sweet sound of swinging and sultry jazz spilled from crowded clubs. That was a heyday for vocalists, which inspired Jeff to seek out emerging jazz singers in the Bay Area. You're listening to Jeff playing "Turtle Blues," with Beth Trifilo on vocals.