Ever heard of Zentangle? It's a method that uses structured patterns to create artwork. Beginners and those experienced in Zentangle are invited to the first meeting of the bimonthly Zentangle Group today at 10 a.m. at the Peabody Institute Library, 82 Main St., Peabody. In this drop-in group, people can work on their own projects in a social environment; assistance will be available for those new to the technique. Bring your own supplies: white card stock, a black micron pen and a pencil. For more information, call 978-531-0100, ext. 10, or visit www.peabodylibrary.org.
Enjoy some improv while also benefiting the Boys & Girls Club of Greater Salem at tonight's performance by Accidentally on Purpose, a comedy improv troupe with a style based on the TV show "Whose Line is it Anyway?" Come prepared to participate. Doors open at 6:30 p.m. at the Moose Family Lodge, 50 Grove St., Salem. Tickets are $10 and available in advance at the Boys & Girls Club, 13 Hawthorne Blvd., Salem. For more information, email firstname.lastname@example.org, call 978-744-0915 or visit www.bgcgs.org.
Curious about gems? David Hill, owner of Tosoro Jewelers in Middleton, will discuss gemstones and jewelry from 6:30 to 8 p.m. at Flint Public Library, 1 S. Main St., Middleton. For more information, call 978-774-8132 or visit www.flintlibrary.org.