You do not own her and you are not her husband. You have no right to tell her what she can or cannot do. In other words, you cannot stop her.
What you can do is talk to her and tell her that her lifestyle is concerning to you. Let her know how you feel and that you don't want to be constantly worried about her when she is out clubbing constantly. Maybe she will change. Maybe she will not. If not, then you will have to make a decision as to whether or not you wish to put up with her behavior.
Just curious, where are you when she goes clubbing every night? Also, you might want to examine the mixed message you may have been sending her. You were ok with her partying at first but now you are not. What changed for you? Maybe it is just time to walk away.