I've done this a few times and it works like a charm, the ladies find it exciting, original, and random which they grin to the ears at. Use this if you're not sure how to "cold approach" online, yes, the simple "hey" or "hi" will fail you, and even if it works, it's not the wisest tactic. Simply chose the hottie you want. Make an event that either has a generic title like, "John's party bash" key point- invite only her.. add a meme or a funny poem, whatever suits your style.. get her to show up and boom it's just you two! deal closed. have fun playing with this and changing the theme and style of implementation!