I've been to the Torch Theatre twice to see my friends perform. The venue is nice and clean. The theatre itself has a large stage and several rows of seating, probably enough space for 20-30 people. Admission is affordable and you feel like you're supporting a good thing. The actors are passionate about what they do and even in the audience, it's a pleasure to be a part of the fun. The improve shows had several groups doing 15-minute sets and I liked all of the skits.
I've never been, but apparently the Torch Theatre offers free improv classes every month. I think it's the first Saturday of every month. I have been thinking about going to a class, but haven't made it yet.
The Torch Theatre has limited parking in front, but lots of space behind the building. The lightrail is very close if you don't feel like driving. Across the street is Hula's, a great spot for a snack, dinner, or just drinks.