Here is an advanced technique that works for me pretty well:
If you have ever been in the situation where you already have gotten strong ioi's from a girl and you are pretty sure she is down to go home with you but you don't know what to say, here is what I do. (Remember this works best if the girl is already on the hook but can also be used to steer her there early in the connection).
With a degree of nonchalant confidence, lean into her and slowly and as smoothly as you can muster say something to the degree of;
"I am having a blast tonight, are you?" (you want her saying yes before the investment move).
When she answers yes you say;
"I have a crazy idea, I can't believe I am saying this but I think we should get out of here and go back to my place (or hers, up to you and the vibe you get from her)".
Then a brief pause and before she answers, playfully but confidently say;
"But you are free to turn down an amazing night of sexy fun if you like" and then smile and sit back.
I have used this technique to seal the deal quite a few times and even when it doesn't work right away it still plants the idea that you are a boss, you are confident that she will have a great time with you and in her head you will be perceived as the type of guy who respects her decisions (which is an appeal to safety, something that all women need to feel before they are going to sleep with you).
You can also work in the "but you are free to" line earlier in your game but I don't recommend using it before getting some IOI's or you are likely to get neg'd. Something I learned in my brief car sales career is that you want people saying yes before you seal the deal, doesn't matter what they are saying yes to, you just want them to agree with whatever statements you are making. That doesn't mean you have to be agreeable, you just want them to agree with you not vise versa.