If I remember correctly: You have the different scenes that you can get with Fiona and/or Lexi. That'd surmount to one during a single playthrough though, depending on whether you're only on Fiona's route, only on Lexi's route (or on both routes without letting Fiona join in), or the one in which she does join. Then you can get the one with Delilah. Those don't require any alcohol level as far as I remember (the Delilah one has different renders and dialogues depending on it, but you can still get the full scene). You then have a very brief scene with Isabella while on the tub if you have enough points with her, but not much happens, and the Siren choice actually brushes her off. Later, if you didn't partake on the quiz, you might've had two alternatives: a sort of threesome with Kimmy and Madison (if you told Kim that you found her girl attractive), or one with Wilma if you interacted with her properly after not participating during the quiz. The former requires almost the highest level of alcohol if you want for Ashe to join in, if not, she can tease Madison a little and then sit and watch. For the latter, I don't remember exactly if you needed a certain level of intoxication, but I think that you had to keep Wilma rather drunk or sober (don't remember exactly as I didn't do that particular one). Finally, you can either have the threesome/foursome with Talia and Cleo (plus Luna if she liked you enough to join), or just straight up watching Cleo have sex with Talia if you didn't accept her drink.
