“Julius Caesar” at 7 p.m. Friday and 3 p.m. Saturday in Danehy Park, 99 Sherman St., in the Avon Hill neighborhood just east of Fresh Pond. Free.

Shakespeare in the park means Shakespeare in two parks in Cambridge, as this Praxis Stage production alternates weeks between the Danehy and Longfellow greens through August – a straightforward, text-faithful, toga-clad production for a company founded in November out of outrage over the election of Donald Trump. So while the motivation of the troupe is political (its shows look at power, from Arthur Miller’s “Incident at Vichy” to this Shakespeare and, next, “Accidental Death of an Anarchist” by Dario Fo) it’s also just an evening outdoors with a free production of classic drama. Information is here.

Outdoor movie night in Harvard Square at 8 p.m. Friday on Palmer Street, Harvard Square. Free.

S.E. Hinton’s novel “The Outsiders” came out in 1967, a YA tale before there was YA of warfare between the Greaser and Soc gangs. Catch a free outdoor movie screening of the 1983 film version by Francis Ford Coppola – you bring a blanket and snacks, and the Harvard Square Business Association and Harvard Coop provide the chairs, fresh-popped popcorn and flick – and cast a ballot in a more benign war: Which is better? Book or movie? People who vote will be entered in a drawing to win prizes (and people who arrive in period-appropriate muscle tees and Levis get bonus ballots). Information is here.

The Hereafter Party: A Benefit for the Children’s Room from 9 p.m. Friday to 12:30 a.m. Saturday at Once Lounge + Ballroom, 156 Highland Ave., Somerville. Tickets are $15 in advance or $18 at the door.

The Children’s Room charity for grieving children gets a rocking boost from this one-night event of favorite hits from the 1980s by bands celebrating music legends we have lost: Heaven’s in Here, a tribute to David Bowie; Bluth, a tribute to George Michael; and Oh Sheila, an all-female tribute to Prince. Forty of Boston’s best musicians and performers are taking part, and there will be dancers, lasers, dress-up – with prizes for great 1980s attire – and souvenirs from Bridget Haley and Daykamp Creative. Before all the music and dancing is dinner in the Lounge at 6 p.m. by Cuisine en Locale. The show is 18-plus; those under 18 must be accompanied by an adult. Information is here.

A Day of Play in Union Square from 11 a.m. to 5 p.m. Saturday around Union Square, Somerville. Free.

Stop by Union Square businesses for fun stuff such as a photo booth at Bronwyn Restaurant; a sidewalk chalk art gallery at Gracie’s Ice Cream; popcorn, stickers, bubbles and general merriment at Loyal Supply Co.; board games at NU Café & Juice Bar Somerville; tango lessons and dance at Tango Society of Boston; and puzzles at Workbar Union. If you’ve stopped by the Union Square Farmers Market from 9 a.m. to 1 p.m. or Union Square Main Streets organization website for a passport, collect stickers for it from at least four stops and get entered into a raffle for a prize package. (The photo above is by Todd Van Hoosear via Flickr.) Information is here.

A Summer Soiree dance party from 5 to 7 p.m. Sunday at The Dance Complex, 536 Massachusetts Ave., Central Square. Free.

Stop in for an afternoon all-ages dance, offering a variety of popular styles from the 1940s to today. No partner is necessary, or experience; tutorials will be offered throughout. (The image above is by Aynsley Floyd.) Information is here.