The two most pressing questions about Saturday's HARD Summer in downtown Los Angeles have nothing to do with quality.

With Soulwax, Crystal Castles and Major Lazer topping a bill that includes the likes of Flying Lotus and Diplo, promoter Gary Richards has assembled the kind of dance party that'll make your glowstick stand up.

But, first, will his fans forgive and forget after the 11th-hour cancellation of HARD Fest last month rendered M.I.A. missing in action?

And will everybody who does show up behave?

You figure the event will be closely monitored in the aftermath of the death of an underage attendee at the Electric Daisy Carnival a couple of months ago. So get your set times here, party hearty and party smartly.

Elsewhere: Silversun Pickups' homecoming show Friday at the Greek Theatre includes Against Me! and the Henry Clay People — but just over the hill, at the other edge of Griffith Park, there's Local Scene Night at the L.A. Zoo: Voxhaul Broadcast, Walking Sleep, Useless Keys and the Happy Hollows are among the bands playing. … On Saturday, Weezer and Hot Hot Heat team up at the U.S. Open of Surfing concert at the Huntington Beach Pier. … The New Los Angeles Folk Festival at Historical Monument 157 brings Linda Perhacs, Mia Doi Todd, Ariana Delawari and a host of others to two stages Saturday afternoon and evening. … And Beatle alert: Ringo Starr & His All Star Band play the Greek on Saturday.

Also tonight: We Are Scientists at the Troubadour; 100 Monkeys at the Viper Room; Superhumanoids and John Carpenter at the Grandstar; Evan Voytas at Spaceland; the Chuck Dukowski Sextet at the Smell; the Donnas and the Answering Machine at the Glass House; Stan Ridgway at McCabe's; Ludacris at the Wiltern; Lights at the Hotel Cafe; Cobra Starship at the Huntington Beach Pier as part of the U.S. Open of Surfing; Jenni Rivera at the Nokia Theatre; and Pat Green at the House of Blues.

Also Saturday: Ariel Pink's Haunted Graffiti at O.C.'s Detroit Bar; the Donnas at the Troubadour; Lost in the Trees at McCabe's; Restavrant at Spaceland; Useless Keys at Casey's Bar downtown; a second night of 100 Monkey's at the Viper Room; Pacific Division at the Roxy; Venus Illuminato at the Echo; and Whispertown at Echo Curio.

Also Sunday: Blondie at the Orange County Fair; Young the Giant at the Troubadour, supported by Grouplove and the Union Line; Corrosion of Conformity as part of the Power of the Riff festival Echoplex; Mickey Avalon at the Galaxy Theatre; Pharcyde at the Key Club; Marvelous Toy at Spaceland; Dirt Dress at the Redwood Bar; the Quarter After at the Bootleg.

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