Boston Fuzzstival 2017 from 6 p.m. to midnight Friday at Once Lounge + Ballroom, 156 Highland Ave., Somerville, and from 1 to 8 p.m. Saturday at ARTFarm, 10 Poplar St., near Union Square, Somerville. Three-day passes (including Thursday’s launch day) are $30; admission to individual days is $15.

The fifth annual Fuzzstival continues its loud and proud mission of showing off local and regional psychedelic, fuzz, garage and surf rock bands – starting with Thursday shows at the Massasoit Elks Lodge, 55 Bishop Allen Drive, Central Square, there will be a full 30 bands of all-ages awesomeness with a Redbones food truck and other local vendors. Information is here.

Heterotopia: Rock Opera Concert & Art Book Release at 8:30 p.m. Friday at Oberon, 2 Arrow St., Harvard Square. Tickets are $15 to $25.

Lainey Schooltree’s prog-rock opera has been electrifying critics and fans around the world, and now it return to Oberon for a reprise of its sold-out premiere performance. This time, the show includes the release of the companion book to the album: kaleidoscopic watercolor storyboard illustrations telling the story of Suzi in Otherspace, including lyrics, plot synopsis and character information. Information is here.

West Cambridge Fall Fest from noon to 4 p.m. at the Fresh Pond Market, at and around 358 Huron Ave., in West Cambridge’s Huron Village. Free.

Construction is over and autumn is here – along with a way to mark both with live entertainment  (bands Lily Black, above, and Dogs in a Pile; a red-carpet fashion show; and pet-owner lookalike contest) food and beverage (with selections from Village Kitchen; pulled pork and mac and cheese from Full Moon; lobster rolls from The Fishmonger; and a beer garden by Paddy’s Bar) as well as pumpkin decorating, firetruck visit at 1 p.m. and crafts, games and face painting. Information is here.

“Smoke This” Rib Fest 2017 from noon to 4 p.m. Sunday on Cambridge Street between Fulkerson and Fifth streets, East Cambridge. Free to wander into, with samples priced individually, but taste tickets are $25 (with a $2.37 online service fee).

The East Cambridge Business Association brings back its “Smoke This” Rib Fest, a culinary showdown pitting pit master against pit master for the title of the best ribs in town. Taste Tickets guarantee 10 rib samples from the restaurants of the buyer’s choice, though each restaurant also sell ribs separately. Participants include Abigail’s, Area 4, ArtBar, Atwood’s Tavern, Bambara, Catalyst, Commonwealth, East Coast Grill, Filarmonica Santo Antonio, Lone Star, Lord Hobo, Loyal Nine, Ole, Portugalia, Puritan & Co., Rindge Vocational Culinary Arts students, Sumiao Hunan Kitchen, The Automatic, The Glass House and Trina’s Starlite Lounge. There will be games for kids with The East End House and music by the Monday Night Bluegrass Band, Muddy Ruckus, Vapors of Morphine and The Silks. Information is here.

The Evolution of Hip-Hop fest from 2:30 to 6:30 p.m. Sunday Union Square Plaza, 90 Union Square, Somerville. Free.

This third annual family-friendly and all-ages showcase features rappers, singers, spoken-word poets, dancers, beatboxers, and visual artists from Somerville and surrounding cities, including live art, interactive activities and community groups. More than a dozen performers (Marcela Crus is above), three dance crews and nine artists will be on hand. Information is here.