I think not all asian parents are like that. Even if they are, you should be proud of your heritage instead of wanting to be something you're not.
i'm getting nagged about when i'm going to give my parents grandchildren; i then pointed out that i dun need to be married to have kids... so now, they nag me about getting married and then to have kids!
Well, since your brother goes clubbing, why don't you tell your parents that you're gonna go with him, just to check it out. Then they'll be relieved because your brother is there to protect you & watch over you in the event that you get molested by other boys or what not.