I am a college student, and I want to find a bartender in Wuhan at night. Where to do such a part-time job?

Ask the boss directly, and you can usually find out. Anyway, working as a waiter in a bar, especially an performing arts bar, will lead to a long life. It's too noisy. Let's go and be quiet. People there are more literate. But I think you'd better find some professional jobs. This job ... maybe you can practice your English in a place with many foreigners.