When the clock strikes midnight on New Year’s Eve, The Hideout won’t be flipping its calendar to 2014—at least not yet. Partygoers at the Noble Square venue will instead travel back to the 1960s, thanks to Girl Group Chicago’s all-women roster of vocalists and instrumentalists. For readers who didn’t catch our pre-Block Party interview with founder and bandleader Shana East, GGC is an ensemble of 20 women who recreate the magic of ‘60s girl groups with pitch-perfect harmonies and matching aquamarine frocks. They’ll be headlining The Hideout’s New Year’s Eve Party alongside local power-trio The Yolks, whose simple, sweaty garage songs are cut from the same ‘60s cloth. Tickets are likely to sell out this month, so get yours today. (The Hideout, 1354 W. Wabansia Ave. Tuesday, December 31, 9 p.m., doors at 8 p.m. Tickets: $20.)