A plot-light story about impoverished creatives getting drunk and moaning about their relationships, “La Boheme” is basically “Girls” set in 1840s Paris. Complete the comparison by seeing it performed in a Williamsburg loft when LoftOpera stages the popular opera, complete with a 19-piece orchestra.
9 pm at the 1869 [215 Ingraham St. between Stewart and Gardner avenues in Williamsburg, (718) 451–6531, www.loftopera.com]. $20.
Got a craving for some top-shelf condiments? Artisan pop-up market Batchery is gathering makers of local hot sauce, honey, jam, peanut butter, salsa, relish, and more in one place. There will also be non-spreadable foods available for sampling and purchase, plus free hot chocolate and live music.
Noon at Bat Haus [279 Starr St. between Wyckoff and St. Nicholas avenues in Bushwick, (917) 865–8660, www.batha.us]. Free entry.
Sweep the leg
Strike first, strike hard, and show no mercy at a special brunch screening of “The Karate Kid” at Videology. The event will include a Skype Q&A with the film’s director John G. Avildsen. Don’t be scared to ask him that burning question you have had since 1984 — fear does not exist in this cinema.
11:45 am Videology [308 Bedford Ave. at S. First Street in Williamsburg, (718) 782–3468, www.videology.info]. $11.
Stimulate your brain and your funny-bone when celebrity astrophysicist Neil deGrasse Tyson comes to the Brooklyn Academy of Music for a live recording of his popular science podcast “StarTalk.” Tyson will be joined by Park Slope-based stand-up comedian Eugene Mirmam, and actress Mayim Bialik — who not only stars on TV show “The Big Bang Theory” but also holds a doctorate in neuroscience.
8 pm at Brooklyn Academy of Music, Howard Gilman Opera House [30 Lafayette Ave. between Ashland Place and St. Felix Street in Fort Greene, (718) 636–4100, www.bam.org]. $35–$50.
Don’t know how to get that mustard stain out of your shirt? That McDonald’s smell out of your car seats? “Hipster homemaker” Jolie Kerr, author of the very funny “Ask a Clean Person” column on websites Jezebel and Deadspin, releases her new book “My Boyfriend Barfed In My Handbag … And Other Things You Can’t Ask Martha” in Dumbo.
7pm at powerHouse Arena [37 Main St. at Water Street in Dumbo, (718) 666–3049, www.powerh