Harvard Square

What do you call four days of live music, with dozens of acts, taking place in an intimate club in Harvard Square? It’s the annual Campfire Festival, in its 25th year, with about 60 musicians performing in short sets at Club Passim.

In celebration of its grand opening, new nonprofit arts space Arrow Street Arts in Cambridge will host ArrowFest, an 11-day festival featuring more than 40 performances and events by local artists.