The under-21 set needn’t feel left out this Mardi Gras season — you might get booted from Bourbon Street, but City Nights is here to provide everything else that marks the occasion: dope decor, masks and beads, and an all-night dance party. Check out the aerialists and stilt-walkers, and get some inspiration from the club’s go-go dancers to sign up for the pole dancing contest — all endorphin boosters minus the booze.