$20? maybe 40 or 50 if you really want to try most of the styles. In the portland area they have a "sour beer tasting" class for 35 that was really neat. Got to try maybe 8-10 different beers, and learn about the different beasties. One of my favorite parts was when they did single brett beers, so you could see what each strain (B, C & L) would do to the beers. I decided I liked L the best.