Yup, pacing and push pull. I've done this so many times it hurts. A girl is into me and I escalate to the point of sex even though it's logistically improbable.
Definitely pace the escalation to coincide with logistics and make sure when you reach that point where sex is imminent to go for a pull, whether it's the bathroom, your car, bedroom at the party, or venue change to one of your apartments.
Make her work for it.