I was thinking about this today and was going to make a similar thread but why not revive an old one. I have a few processes depending on the situation.
Night
At night, I tend to use situational stuff to open. I don't really take anything seriously from night game, literally just use it for quick interactions and the thrill of meeting someone new. I rarely even take girls numbers at night anymore because usually if it's not on in that moment, it won't be in the future and unless there's a real reason why she can't go home with you right then, she'll find a way. But what I do is talk, physically escalate quickly then pull back(push pull) and I've also found not kissing the girl when she knows that you know you can is also really powerful. Most guys can't wait to stick their tongues down her throat and she likes the validation of that but if you hold it back, it keeps that sexual tension bubble going for longer, so you get a bigger pop

I've found that at you can find a girl that it's just on with and if you get her to a place where you guys can hook up straight away. As for getting a girl out of a bar/club, it's the old "let's go and get some food", then get to get her back to yours some more spiel to give her an excuse.
Day
One of the reasons why I really got into approaching girls during the day was online game, I used to try it and it just never worked for me and it was too frustrating. I knew that if I ran into these girls at another time, I'd have a shot and I wasn't wrong. Whether it's asking for a girl's help in a shop or going direct and saying you think she looks nice and giving her the opportunity to get to know you, it's just so refreshing. It's so easy to get into a bit of confab with a stranger and just create this little bubble and you can tell the moment where she hooks and is just really into it. I remember running into two Swedish girls a while back, they were both 18 in London for the weekend and this girl ditched her mate for a few hours to spend time with me, a complete stranger. I can't see a girl doing that with me if I met her anywhere else, just during the day because it's so raw and unforgiving.
Social circle
It's so easy to hook up with a friend of a friend. I even gone as far as saying to a friend "oh your mate's pretty hot, invite her out to blah blah" and you're suddenly in with a shot. I have a few great female friends who have "provided" a number of friends that I've hooked up with. I always find it starts with the introduction, just make it light but friendly then eject, go and have fun with your friends. Then about an hour in go and talk to the girl, get yourselves seat slightly away from the group and start teasing the girl, the comfort is already there because you're all "friends" so you don't need to have that awkward getting to know you part, you assume it. Then you have to read the situation and depending on what you guys are doing, you act accordingly. With some friendship groups actively trying to get her number in front of everyone might be weird so you just add her on facebook later and message her, then get her number that way. But sometimes you might be able to go all the way that evening if the logistics are right. Two weeks ago I was having sex with a girl in a friend's laundry area. I've realised that guys on here don't really like social circle stuff because it's easy to get a reputation, screw up friendships if you go after the wrong girl, you have to be able to maintain friendships with girls you don't want to fvck and you have to be savvy.
Overall
Of course throughout though there are going to be some constants, the first is which the push pull. At night, it's the physical escalation then no kissing or actively leaving. During the day, it's more body language. For social circle stuff, it's leaving and delaying situations. Another constant is just the vibe you give off, a non-needy guy can excel in all three of these areas. The vibe is slightly different for all of these but it's always there that you're a sexual guy and you're living your life to your own standards. You don't really care if your friend knows you're hitting on her mate because you're that kind of guy. You don't care that she's on a girls night out with her mates and you're trying to get her back to yours because you're that kind of guy. You don't care if you're hitting her whilst she's trying to buy new bed linen because you're that kind of guy. The kind of guy who doesn't want to pass up an opportunity and when I'm in that mode, I know it's so attractive.