Looking for something to do this weekend? Steve Junker and Kathi Scrizzi-Driscoll have a few suggestions for you. Wellfleet is hosting three days of events to commemorate the Matin Luther King Jr. holiday weekend. After six years, Provincetown's Universal Theatre Festival is closing with big hurrah. And singer Tedi Marsh performs at the Cotuit Center for the Arts, with special guests and new songs.