It’s impossible not to have fun tonight Frenchmen Street.  Two brass bands, the Rebirth at 7:30 PM and the TBC at 10:30, will be marching up and down the five-block stretch.  All the clubs and most of the restaurants along the way are presenting music.  Here are some of the bands to look for.  The saxophonist Rebecca Barry was a stalwart on the scene before Katrina, she now lives in Alabama but is back for a set tonight at the Apple Barrel.  Norbert Slama also used to live in New Orleans, now he’s back.  He is a French accordion player who sounds amazing even for people who don’t love the accordion.  He’s with a trio at Yuki also at 7:30 PM.  Carl LeBlanc plays banjo with the Preservation Hall Jazz Band.  Tonight, he’s on his original instrument, the guitar, with his own group at D.B.A. at 6 PM.  Shamarr Allen follows at 10.  There are literally dozens of others acts performing.  So strut up and down the street and stop when it sounds good.