G&G (now Willie's Deli, I think) in Tianmu had a sign up saying they teach cooking.
And across the street from that is Le Jardin cooking studio. They teach French cooking, as well as Chinese, Japanese, Italian, Thai-Burmese and Indian cooking, desserts, bread baking, wine (tasting?) and kids' classes, and do catering. 2877-1178, www.le-jardin.com.tw
Tianmu, Zhongshan N. Rd. Sec. 7, Lane 14, #15, 1F
They normally teach in Chinese but if there's a group large enough interested, they can open a class in English or one of the other languages one of the chefs (Swiss?) speaks. It looks like they have different teachers for each cuisine.