evening class
noun [ C ] uk/ˈiːv.nɪŋ ˌklɑːs/ us/ˈiːv.nɪŋ ˌklæs/
（成人参加的）夜校，夜校课程
a class intended for adults rather than children that happens in the evening
Pat teaches evening classes in yoga and relaxation. 帕特在夜校教瑜伽和放松养生功。
I've been going to evening classes to improve my German. 我一直在上夜校进修德语。