24-Hour Performance Marathon and Telethon from 10 a.m. Friday to 10 a.m. Saturday at Somerville Community Access Television studios, 90 Union Square, Somerville. Free.

This 24-hour variety show can be watched online or in person, stretching through stultifying Friday work hours, evening prime time and stretching into early morning hours when there might be literally nothing else to do. Boston Hassle and the related Brain Arts Organization, which are putting this on in hopes of raising $5,000 toward opening their own performance space, say performances will include comedy, magic, impersonation, music, drag, performance art, demonstrations, live science experiments, political visits, sketch comedy, juggling, nonprofit group presentations, storytelling, dancing, animations, short films, video art, cooking demonstrations, monologues, children’s reading time, puppetry and more. Organizers warn that, while a tent village might pop up in the concrete park next to the Somerville Community Access station, space will be limited inside. The event can be watched on SCATV Channel 3 or streamed SCATV’s website or Roku, and interviews with performers can be heard on BostonFreeRadio.com. Information is here.

Great Boston Chili Bowl from noon to 3:30 p.m. at the Tech Square Atrium, 100 Technology Square, Kendall Square. Tickets to this 21-plus charitable event are $56.50, which includes entry to the event, unlimited chili and beer samples, a commemorative tasting glass and onsite garage parking.

Last year’s event sold out, and this third annual all-you-can-eat event could do it again, since it not only brings together local restaurants and breweries to showcase their variations on chili and beers, but sends all money raised to research at the ALS Therapy Development Institute, the world’s largest drug development organization dedicated to ending ALS, also known as Lou Gehrig’s disease. Participating restaurants include Cambridge’s Catalyst, Fuji, Puritan & Co. and The Red House; also cooking are Boston’s Lolita Cocina & Tequila Bar, Taranta and Yvonne’s; and Chica de Gallo of Jamaica Plain and Tortilleria La Nina of Everett. There are seven participating breweries, including Somerville’s Aeronaut. Information is here.

The Radius Ensemble premieres “*12*” from 8 to 9 p.m. Saturday at the Longy School of Music’s Edward M. Pickman Concert Hall, 27 Garden St., Harvard Square. Free.

This world premiere by composer Eun Young Lee doesn’t include roles for a ; audience members will participate in – and affect the final outcome of – the performance in real time using their smartphones. “Music should exist for people,” the composer says. “This is also my belief and one of the reasons that I am also very much interested in collaborating with other artistic genres: dance, literature, fine art, film and multimedia.” In this piece, inspired by the zodiac, the interactive technology element has been designed with Radius’ own longtime clarinetist, Eran Egozy, creator of “Guitar Hero” and “Rock Band” and now professor of music technology at MIT. Also included is a sextet for piano and winds by Francis Poulenc and “It’s So Wonderful,” a quartet for flute and strings by Larry Rubin, winner of the fourth annual Pappalardo Composition Competition. Information is here.

Indoor Playground Family Fun Day from 2 to 5 p.m. Sunday at The Center for Arts at the Armory, 191 Highland Ave., Somerville. Admission is $5 per person, with a maximum of $20 per family.

It makes sense that this event, which brings outdoor voices inside, benefits soundproofing efforts at the Armory event space. At this indoor playground, Knucklebones providers fun for littler kids, there’s a parkour course for the bigger ones, a beanbag toss game for all ages, face painting and more, including light refreshments (and even alcoholic drinks, which are not included in the price of admission). Information is here. (Maybe Saturday’s when you really need a place for kids? Try the Kids Union Dance Party from 3 to 5 p.m. Saturday at Thunder Road, 379 Somerville Ave., Union Square, Somerville. It’s $5 for kids who can dance; free for babies and parents, and information is here.)

“Unconventional,” a Sunday Afternoon with Patchtax and Andria Nicodemou from 4 to 6 p.m. Sunday at The Center for Arts at the Armory, 191 Highland Ave., Somerville. Admission is cash only, by $10 with a reservation made up until 3 p.m. Sunday, or $12 without one.

Unconventional, indeed – Patchtax is made up of viola player Eve Boltax and saxophonist Mary Joy Patchett, and their goal is to redefine the parameters of classical chamber music, which leads to all sorts of wild collaborations. Patchtax described their work with dancer Elizabeth Epsen (including some performance at the Armory) as “intended to eliminate boundaries between the dancer and musicians, creating work that is both sensual and absurd.” Now, after a residency at the Banff Centre in Canada, the duo is back with Andria Nicodemou, a musician from Cyprus who specializes in vibraphone and improvisation – sure to be a challenging, enlightening way to wrap up the weekend. Information is here.