The trio performed “Welcome to New York City” at the venue’s re-opening. In celebration of the re-opening of Webster Hall, a feat that he helped make happen, Jay Z put on a star-studded “B-Sides 2” concert. Jay previously had beef with Dipset members Jim Jones and Cam’ron, and while Jay and Jones put their differences aside years ago, there was no formal resolution between Jay and Cam. However, they all …