1. Do your own research. Check out a few places (clubs/bars) and find one YOU like AND most importantly where you see random couples meeting and leaving together.
So many guys get pressured into going to places they don't like and places that really aren't good pickup joints because their buddies insist that the place is good.
Don't go by rumors about how good a place it. You have to see it yourself.
2. Use your "gut instinct" or intuition to choose targets. If you were alone and free to approach any girl you wanted without judgement, who would you approach? Which girl do you have a good feeling about and generally look forward to meeting? (She might not be hottest. She just has to pass the boner test and not be a bytch.)
3. If you dance with her, try to turn her so she faces you. Do NOT just grind her back side indefinitely. If she won't let you turn her to "face to face" during dancing, she probably isn't attracted to you and wants to avoid a possible makeout.