By March 2012, Philadelphia stopped having WISX as the market's only hot adult contemporary, and WSTW flipped to hot adult contemporary when Mediabase made a panel shift on WSTW from top 40 to hot AC.
Bill Simpson, who would later host a nighttime show on both incarnations of Smooth Jazz WJJZ (first at 106.1 and later at 97.5), used the alias Dave Sanborn on the show, which often created confusion with the well-known jazz saxophonist David Sanborn, especially among those who were not regular listeners.
The club closed on April 29, 2007, Robert Bynum stating "we didn't think it was in our best interests to renew the lease. We'd rather own our building than lease." WJJZ, Philadelphia's smooth jazz radio station broadcast Sunday brunches from Zanzibar Blue, and performers such as Lou Rawls, Chick Corea and Chuck Mangione have played there.