There was a time when Margie Perez didn’t think of herself as a performer, aiming instead for a gig writing songs behind the scenes. Those days are long gone, and during French Quarter Fest she’ll be performing all over the place: with the Afrobeat orchestra Kumasi on Friday, with the Latin band Muevelo on Saturday, and then playing her own material—which combines funky rock with both the above influences—at the songwriter...