Ninth-grade history teachers at Cambridge Rindge and Latin developed an opening unit on local democracy, confident their young learners would become some of the most informed (non)voters in the city.

Twenty-five bands from as far away as Brazil and Berlin strutted their stuff down Massachusetts Avenue from Somerville to Cambridge on Sunday, dancing, shouting and, well, honking as part of the year’s Honk! events and Oktoberfest.

In a look ahead at a week of Cambridge and Somerville events, there is the “La Sonnambula” opera, the unveiling of a life-size robot sculpture, an epic improv comedy fest, and theater, dance, movies and poetry, from DeWitt Henry to Olivia Gatwood, much of it free.

The dramatic one-act play “The Real Me” returns next week to mark the start of autism awareness month, just short of a year since its U.S. premiere in May at Lesley University.

“What Is Democracy?” is vast in its exploration of politics from ancient Greece to today’s U.S. upheaval, juxtaposing everyone from trauma paramedics to Marxist theorists, and has sheer ambition that elevates it above just being a rehashed history lesson.

Antonia Grace Glenn returns to Cambridge for the East Coast premiere of her documentary film, “The Ito Sisters: An American Story,” as part of the Boston Asian American Film Festival.

So where’s the case for impeaching President Donald Trump now? There’s a free book discussion and signing Wednesday explaining it, led by the three authors of a book arguing that in this potential case for impeachment, “The Constitution Demands It.”

Though the “living room for the community” or “indoor public park” known as CultureHouse was intended to be only a one-month pop-up, overwhelming public response has encouraged a founder to promise it will reopen soon.

Domino’s Pizza has gone from being fodder for stand-up comedy and liberal outrage to a company with a revamped look and mission that now drives discussion over municipal infrastructure. No, really.

There is a Memorial Day parade and related observances planned for Monday, as well as public meetings on gun violence in The Port and Wellington-Harrington and in public schools. A municipal meeting will explore legal issues over revamping an empty 12-apartment building.