20,000 vaccinated and maskless revelers were treated to Madison Square Garden’s first post-pandemic (or, uh, mid-pandemic) concert on Sunday night, with confirmed rock legends Foo Fighters giving the fans exactly what they wanted: a three-hour, eardrum-rupturing performance and Dave Grohl’s fantastic, sweat-filled hair. Oh yeah, and Dave Chappelle also stopped by to perform Radiohead’s “Creep,†a song that he’s loved dearly for several years. “We were the band that got to reopen fucking Madison Square Garden, that’s some real shit. So I thought maybe we should do something special, just so it’s a night to remember,†Grohl teased the crowd. “I know a few Daves, but to be honest, my favorite fucking Dave is here tonight to sing a song with us.†Man, hasn’t Dave Matthews already been through enough …