Impromptu Learning: Presentation Party Night
A booze-addled salon (pictured) where food and beer are free — but bring something to share.
The syllabus: Past talks include "A History of Nuclear Weaponry," "The Musical Lives of NBA Stars," and "Famous Toilets."
Sun 11p. Bat Haus, 279 Starr St. (St. Nicholas Ave.), Bushwick. Free.
Nearby: Cobra Club; Northeast Kingdom; Mazelle
Digital + Art: Seven on Seven
This conference pairs artists with technologists who present artworks and ideas, followed by a kickin' afterparty.
Of note: Don't miss the presentations by beat-maker Fatima Al Qadiri or interactive media artist Rafael Lozano-Hemmer.
Sat noon. Tishman Auditorium at the New School, 66 W. 12th St. (6th Ave.), West Village. $40-125 here.
Nearby: Kin Shop; Tertulia; Sammy's Noodle Shop
Go Green: Herb Festival
The McKittrick Hotel honors 4/20 with a two-day opening party at its seasonal garden lounge Gallow Green.
Hurry quick: Saturday sold out, but there are a few spots available Sunday for potent drinks and treats.
Sat-Sun. Gallow Green at The McKittrick Hotel, 542 W. 27th St. (11th Ave.), Chelsea. $35 here.
Nearby: Hotel Americano; Bottino; Trestle on Tenth
Spin City: Record Store Day
Break out your wallet for the gems on display during Saturday's annual vinyl celebration at stores around the city.
Our picks: To start, hit up Other Music, Kim's, Turntable Lab, and Academy LPs before moving on to other indie shops.
Sat. Various locations, full list of participating stores here. Free.