Rough it up with the Derby Dames, yuck it up with the Van Burens.
Community Open House and Student Marketplace
5-7 p.m., Free
107 Portland St.
Grab some free hot dogs and burgers and check out The Possible Project, a center that teaches high school students about running their own businesses. The after school program, which operates out of a spare room in one of Cambridge’s public housing projects, helps teens develop business concepts and skills like public speaking and marketing that would help make their ideas a reality. Mingle with up and coming entrepreneurs and other members of the business community, and catch a demo of their 3D printer and laser cutter.
Tropical Island Night
7 p.m., $30 for members, $35 for nonmembers
Harvard Museum of Natural History
26 Oxford St.
This special (21+) event will celebrate the inauguration of the museum’s newest exhibition: Islands: Evolving in Isolation. Music will be provided by local musician Charleston Sarjeant, who will get you in the island mood with some steel drums. Light appetizers and cocktails will accompany you through the museum, and guests will receive a free pass to Privateer International’s Ipswich distillery.
Boston Derby Dames Home Team Double Header
4 p.m. doors, $12-25
155 Gore St.
Never been to a roller derby match? Grab your tickets and settle down for one of the most exciting displays of athleticism and grit on this side of the river. This double header pits the Wicked Pissahs against the Arkham Horrors and later the Nutcrackers against the Cosmonaughties. Tickets gets you into both matches as well as the after party with the Dames themselves!
The Van Burens
10 p.m., $5 (21+)
The Middle East
This band, which hales from Quincy, says it’s “dedicated to life, liberty and the pursuit of funkiness.” Their music is jam band prog rock with lyrics that might have gotten you through a high school history class. It’s all good funky fun as the group pokes fun at any and all leaders of the free world.