Rhythm and blues hit-makers Boyz II Men and En Vogue will perform at DTE Energy Music Theatre on Thursday, July 15 at 7:30 p.m. Tickets at $36.50 pavilion and $10 lawn go on sale this Friday, April 2 at 10 a.m. at Palacenet.com, The Palace Box Office and all Ticketmaster locations. Tickets may also be …