When it comes to the pick-up line, you need to drop it. Like, right now. It never wins you points because once it’s said in one place, it gets spread like wildfire everywhere else (women will tell their girlfriends what was said and they’ll their friends and on and on…)
When it comes to your approach, just proceed with confidence, make sure your presentation is solid, and be natural. A pick up line will never magically sway you from being unlikeable/layable to very likeable/layable. If she liked you or didn’t like you, the line will have no sway in that. The day an overweight, acne-face filled gent living in his parent’s garage swoons a Victoria Secret model all on the merit of one cheesy pickup, will be the day I mail you a Canadian dollar and shoot myself in the head. Just be yourself, folks.