picking up women at clubs is a completely different beast then picking up women during the day.
At night, the energy is high and things are moving
fast. That's why women will always give you a way quicker rejection in the evening then during the day...they are out to get wild and be adventurous, but only with men that are on their level.
When you go to approach at a night club, don't wait for eye contact, just go into any set with high energy and intent. Be sure to project your voice as loudly as possible so they don't have to keep asking "WHAT?" It gets really annoying, fast, for both parties and really bad for maintaining the conversation.
What you say isn't really the point because they will miss half the stuff that comes out of your mouth anyway. Just go in and convey your intent through body language. If you are a beginner, expect to get turned down. A lot. But don't let that deter you. You need to be able to become impervious to rejection to see real progress.
Night game is really a numbers game. If you want a greater rate of success, try out the
mystery method. But keep in mind no amount of canned lines and routines will help you if you aren't used to conversing first.