New “Late Night” host Seth Meyers has tweeted a picture of his late-night band, revealing for the first time a lineup that includes members of Les Savy Fav, Girls Against Boys, and Beyonce’s band. Perhaps the most intriguing member, however, is Meyers’ former “SNL” castmate Fred Armisen, who will lead the band, following in the footsteps of ?uestlove and Max Weinberg.