Dancing on the Row from 6 to 8 p.m. Friday on Assembly Row, 340 Canal St., Assembly Square, Somerville. Free.

Salsa Dance on Assembly Row East (between the Loft and J.P. Licks) starting with a half-hour class for beginners. Information is here. (And for those who can’t make it or prefer a 1920s swing dance, there’s a free Balboa and Ice Cream Social from 4:30 to 7:30 p.m. Sunday in Jill Brown-Rhone Park, near Central Square, with practice from 2 to 4 p.m. beforehand in the The Dance Complex, 536 Massachusetts Ave., Central Square.)

Meet the Washingtons from noon to 4 p.m. Saturday at Longfellow House, 105 Brattle St., West Cambridge. Free.

His Excellency Gen. George Washington and Martha Washington return to his Cambridge headquarters, where they’re available for questions and photographs in character and visitors can try out colonial clothing, play historic games and experience events of the late 18th century through a ranger-led walking tour call “Road to Revolution” at 2:30 p.m. Information is here. (There’s more historical reenactment from noon to 1 p.m. Sunday at Longfellow House: “Singular Characters: Hawthorne & Thoreau” celebrates Henry David Thoreau’s 200th birthday as performers Richard Smith and Rob Velella chat using words gleaned from letters, journals, speeches and other writings by Thoreau and Nathaniel Hawthorne.)

Okilly Dokilly’s “The Death to False Nedal” Tour from 6:30 to 9:30 p.m. Saturday at The Middle East Upstairs, 472 Massachusetts Ave., Central Square. Tickets are $15 for this 18-plus show.

How can you not? Okilly Dokilly is called the world’s most popular Ned Flanders-inspired heavy metal band. And they perform on a bill with Math The Band and Black Trip. Information is here.

Sindependence Day IV from 9 p.m. to midnight Saturday at The Thalia, 288A Green St., Central Square. Tickets are $13 (or $14.45 with an online service fee).

The Federation of Belligerent Writers comes straight outta Worcester with this unique form of competitive improvisational comedy, in which three words are chosen randomly and members of the troupe have five minutes or less to write a script using them – before actors bring the script immediately to life and the audience determines the winner. The audience is encouraged to be loud and raucous as possible, and anything is possible; the troupe cites times audience members have enjoyed throwing balls at a drunken, pants-less Iguana and dancing the conga with zombies, grumpy fairies, and video game villains. Information is here.

Nepal Festival from noon to 6 p.m. Sunday at Union Square Plaza, 90 Union Square, Somerville. Free.

Nepali cuisine, music, dance, arts and handicrafts are showcased, including food from Tasty MoMo, Himalayan Kitchen and Himalayan Bistro and plenty of live performers – not just traditional folk, but Nepali rock as well, from Monday Junkies and DJ Mukund. Hosted by the Greater Boston Nepali Community and Somerville Arts Council. Information is here.