The second annual Week of Fun comedy festival starts today, showcasing the best of Seattle's alternative comedy scene. How did we get the best? What is alternative comedy? We bribed their egos, and I don't know. But I do know now is a time for fun, and that's what this show is. Visit www.weekoffun.com for more info. (Central Cinema, 1411 21st Ave, 686-6684. 8 pm, $8, all ages.)