North American Print Biennial with opening reception from 2 to 5 p.m. Saturday in the Roberts and Raizes galleries at Lesley University’s Lunder Arts Center, 1801 Massachusetts Ave., Porter Square. Free.

More than 1,900 entries arrived for this art show, and juror Judith Brodie, curator of the National Gallery in Washington D.C., accepted 86 for exhibition as the Boston Printmaker North American Print Biennial, at Lesley with a companion student show from Saturday through March 4. The selections cover traditional and innovative media – one print will even grow grass during the five-week exhibition (Eric Avery’s work, above). “Judith Brodie selected works that are bold, broad-minded and intelligent,” says Renee Covalucci, president of The Boston Printmakers association. “The prints on view reveal the issues of today in subtle and overt ways, and will compel a close inspection and reflection to reveal their deep examination of society.” Brodie speaks at 1 p.m. Saturday, with the reception following. Information is here.

Taste of Chocolate Festival, with free Chocolate Tasting from 1 to 2 p.m. Saturday on Brattle Plaza, Harvard Square. Free.

The 10th annual festival goes on through the weekend, with spots around the square amping up their chocolate offerings, but it’s the hour of free samples that really draws the crowds. Contributors of free treats include Benedetto; Cabot’s Candy (above); DavidsTea; Flour Bakery; Freepoint Hotel; Harvest; Henrietta’s Table; J.P. Licks; Parsnip; Pressed Juicery; Roseadela’s; Seacoast Sweets; Starbucks; Toscano; and Zinneken’s. The band Grooversity will provide percussion-based music to keep everyone moving and warm. Information is here. (Others have jumped onto the chocolate weekend schedule, such as Spindler Confections, with its own 6 to 7:30 p.m. Friday tasting at its 2257 Massachusetts Ave., North Cambridge, shop.)

Boston Underground Summit 11 from 8 to 11 p.m. Saturday at Massasoit Elks Lodge, 55 Bishop Allen Drive, Central Square. All-ages admission is $10.

Nine (or so) bands set up round-robin style in two rooms and three stages and take turns playing songs, repeating the loop again and again and again, aiming to top each other’s previous song and then top it again. The bands expected to be summiting this time around: Squilch; Scream Castle; Guiding Wave; Goon Planet; Rogozo (above, in a photo by Kit Castagne); ____Hightlightreel; The Laces; Porno Portal to Florida; and The Jazz Massagers. Information is here.

“Epoch: Classical Music from the Baroque to the Modern Era” from 3 to 6 p.m. Sunday at the Granoff Music Center at Tufts University, 20 Talbot Ave., Somerville. Free.

Listen to the centuries speed past via the melodies of Tartini, Beethoven, Dvořák, Bloch and Goolkasian Rahbee (above) as performed by violinist Amos Lawrence; cellist Jamie Clark; and pianist and Tufts faculty member Arminé Karapetian Donato. Information is here.

Lizard Lounge Slam Team Finals from 7:30 p.m Sunday to 1 a.m. Monday at The Lizard Lounge, 1667 Massachusetts Ave., between Harvard and Porter squares. Admission is $7.

This is it – the best of the best competing in the finals for the 2018 Lizard Lounge Poetry Slam Team. That means that as good as Jeff Robinson’s Slam & Jam is every week, the poetry and spoken word talent tonight will squeeze the absolute sweetest juice out of your mind grapes. Taking the stage will be Michael W. Bonds; Will Chalmus; Abioseh Joseph Cole; Art Collins; Usman Hameedi; Harlym 125; M’shairi T. McKenzie; and Katya Zinn. Information is here.