A roiling symphony of nightlife: Mason Bates, Leslie and the Ly's, Mr. Ties, Ambivalent, DJ Deeon, more parties
SUPER EGO A couple of years ago, Muni put out a public safety campaign that showed this gorgeous woman in giant silver headphones texting ferociously right before she stepped into the path of an oncoming train. Tagline: "Do you want Beethoven to be the last thing you hear? "
Which was a bit unintentionally hilarious because, yes, I do want Beethoven to be the last thing I hear, specifically the insanely great, otherworldly "late string quartets," which would be a fine soundtrack with which to finally divest myself from this gorgeous, all-natural, all-me, not-silicone-at-all, nope-definitely-not, personal body.
But I'll take any Beethoven at all, really — and local contemporary "laptop classical" composer Mason Bates is teaming up with the SF Symphony for a special treat: two nights of great Beethoven works paired with Bates' electronica-obsessed orchestral pieces (Symphony No. 7 and The B-Sides Jan. 8-11, and Mass in C Major and Liquid Interface Jan. 15-18, www.sfsymphony.org ).
If you're unfamiliar with Bates, he uses digital and electronic instruments to bring lush, eerie dancefloor atmospherics and a leftfield backbeat to a full symphony and chorus setting. Adding Beethoven's existential and ecstatic works to the mix might start some kind of weird fire.
The Berlin-via-NYC favorite, a.k.a. Kevin McHugh, takes a heady, design-oriented approach to techno, reaching back into minimal to tease skeins of pulsing sonic ideas into a more visceral present. And you can dance to it. With Mossmoss, Brian Knarfield, Bob Five, and more.
Fri/10, 9pm-4am, $15. Monarch, 101 Sixth St., SF. www.monarchsf.com 
And he is hot! Out of the current crop of tech house pretty boys, Daley Padley of Leeds is also one of the sharpest, with a thoughtful sound that isn't afraid to recall your champagne hangovers and long-lost puppy love dreams.
Fri/10, 9:30pm, $15-20. Audio Discotech, 316 11th St., SF. www.audiosf.com 
Have you heard this Berlin bearded queer techno wonder's killer, slow-burn three-hour Boiler Room DJ set? Kind of all you need to hear. He's coming in from his beloved Homopatik club to play Honey Soundsystem's "Midi Slave" party, and it will get steamy.
Fri/10, 9pm-4am, $10–$15. F8, 1192 Folsom, SF. mrtieshoneysoundsystem.eventbrite.com
Experimental psychedelic electronic music brings all the kids to the yard for a mini-festival of sorts. Headliners Circuit Slave slice punk angst through the wiring; duo Cry gets emotive with some 4AD-influenced eeriness, Bezier's loops and arpeggios drive us back to analog days. With Redredred, PSSNGRS, and PowWow.
Sat/11, 9pm, $5, The Holdout, 2313 San Pablo Ave., Oakl. www.tinyurl.com/circuitslaveOAK 
"Let me bang!" The legend of booty bass comes to the jackin' Two Men Will Move You party for a night of low-low-low.
Sat/11, 9pm, $8. Amnesia, 853 Valencia, SF.
The NYC superfox of house grooves somes to the monthly Isis party, bringing with her a dose of classics with a devilishly danceable helping of transcendent 1980s and early '90s sound-a-likes. Nice and funky, with a slow-motion vogue-ready twist. With Avalon Emerson, Hi Today, and Brittany B.
Sat/11, 9:30pm-3:30am, $10 advance. Public Works, 161 Erie, SF. www.publicsf.com 
Rickshaw Stop celebrates 10 years of rolling us out — wow, remember the insanely fun hipster-glitzy hardcore electro scene there? — with this appearance by the Iowan queen of hyper-ironic dance rap (she made it into art). Grab your gem sweater and let's reach for the gold!
Sun/12, 8pm, $16, all ages. Rickshaw Stop, 155 Fell, SF. www.rickshawstop.com