Concert Notes: Tickets for Grace Potter, Regina Spektor, Off!, & More Going on Sale Fri.

Friday's another big day for popular concerts going on sale, whether you're interested in the strong female voices of Grace Potter, Regina Spektor, and Erika Wennerstrom of Heartless Bastards to the rousing rock of Off! and the bluesy jams of Gov't Mule (for those who like to plan ahead for New Year's Eve). Here are the details:

Grace Potter and the Nocturnals play the Beacon on Nov. 16th & 17th.

On sale Fri., Aug. 17th:
* Grace Potter & the Nocturnals at the Beacon Theatre, Fri. & Sat., Nov. 16th & 17th. On sale: 1 p.m.
* Gov't Mule at the Beacon Theatre, Sun. & Mon., Dec. 30th & 31st. On sale: 12 p.m.
* Regina Spektor at the Beacon Theatre (with special guest Only Son), Wed., Oct. 24th. On sale: 9 a.m.
* Heartless Bastards at Irving Plaza (with Futurebirds), Sat., Oct. 27th. On sale: 10 a.m.
* Off! at Irving Plaza (with The Spits and Double Negative), Tues., Oct. 16th. On sale: 10 a.m.
* The Dirty Guv'nahs at Highline Ballroom, Tues., Nov. 15th. On sale: 12 p.m.

If you're interested in free shows this weekend, there's no shortage. On Saturday, there's an afternoon Australia Day show at Central Park SummerStage; Sharon Jones and the Dap-Kings (with The Electric Sound of Johnny Arrow, Antibalas, and SJDK) at Williamsburg Park; and Tokyo Police Club headlining the Lackawanna Music Festival in Hoboken (see info on the festival layout and set times here).

Free shows on Sunday the 19th include an afternoon Jamaica's 50th Anniversary of Independence Celebration with Inner Circle, Israel Vibration, and more at Central Park SummerStage, and comedy in East River Park as the Upright Citizens Brigade presents "The All-Stars of Improv."