In a look ahead at a week of Cambridge and Somerville events, there’s the Honk! festival of activist street bands and Oktoberfest in Harvard Square, Devendra Banhart and Eugene Mirman, Kristen Emack talking about her “Cousins” photos and the arrival of “Sweeney Todd” in a new theater.

In a look ahead at a week of Cambridge and Somerville events, there’s the Cambridge Science Festival and carnival, the start of the Honk! festival of activist street bands, Central Square Dumpling Festival and “Smoke This” Rib Fest, Ashley Judd for Ms. Magazine and Walter Isaacson for “Elon Musk” and much more.

In a look ahead at a week of Cambridge and Somerville events, there’s Cambridge Science Festival doings, the annual Fluff festival, clown class, Black Biz, roller disco and John Coltrane from the Cambridge Jazz Foundation.

In a look ahead at a week of Cambridge and Somerville events, there’s Wayne Newton, Zadie Smith and Naomi Klein, the Cambridge Carnival, Boston Fuzzstival and Somerville Toy Camera Festival, close-up magic and MIT games, arepas and beer, basketball gods and Kristen Emack photography.

A week of events in Cambridge and Somerville, from Passim’s Campfire Weekend to large walking puppets to Wayne Newton at the 98th Annual Italian Feast of Saints.

In a look ahead at a week of Cambridge and Somerville events, there’s the return of a lost screen gem called “Tokyo Pop,” Boston’s Biggest Drag Dunce, the 5, 6, 7, 8’s perform, belly dancing, nature walks and much more.

In a look ahead at a week of Cambridge and Somerville events, there’s a Hot Girl Cypher, a tour that maps feminist Cambridge, Cara Fitzpatrick discussing “The Death of Public School,” free kayaking on the Charles, a Ifeanyi Menkiti memorial poetry reading, butterfly release party and the play “Forgive Us, Gustavito!”

In a look ahead at a week of Cambridge and Somerville events, there are vintage markets, dance parties, a horror-themed supper club, adult dress-up Legos party, a one-night-only “Namaslay” puppet musical and a “waterfall” dance workshop for everyone.

In a look ahead at a week of Cambridge and Somerville events, the Cambridge Jazz Festival and Feet Keep the Beat Festival arrive, the Bridgeside Cypher returns and there’s roller disco, a horror-writing workshop, search for butterflies and dragonflies and much more.

In a look ahead at a week of Cambridge and Somerville events, there’s AfroVybe and Bastille Day festivals, pupusa making, herbal tea blending and free cookies with music, poetry, music and a third annual Bollywood night at Starlight Square.