6 p.m. Be there. And why not. Getting back to their busking roots, these cheerful twee-core warriors are; a couples week back, opening for Mumford & Sons, they made the Bowery Ballroom feel like a library, and the assembled jaded-spectator adults therein feel like giddy five-year-olds. I imagine you have a pretty good idea whether this is your thing or not. If not, better cab it home.