Jon Bon Jovi to attend Philadelphia Style relaunch bash

is on the program for

's private relaunch party May 9 at the Atrium at City Hall.

will also attend and

, a local actor from the musical "Jersey Boys," will perform.

's Niche Media, which also publishes Gotham, Hamptons and Los Angeles Confidential, bought

from

in February. Publisher

and Editor

have stayed at the mag.