Invite her up to see your teacup pig.
It really doesn't matter, as long as you give her plausible deniability.
You see, she didn't go up to your room with the intention of having sex with you. Once she was there, things just happened.
Look at my record collection, check out the view from my room...
This is good. I have pictures and paintings in my room so I’ll invite her over to see those and take it from there.
Yes, this is is the way to do it.
After someone gets laid in college, the question becomes "What's next?".
In the chart below, we can see that fewer long term relationships are forming at college.
For decades, as more people went to college, more people formed extended romantic relationships from interactions on campus or related to campus life (Greek Life, extracurricular clubs, etc.) with the man approaching the woman. Around 2000, as the Millennials were first getting to college, formation of longer term couples in college diminished. I've tracked a lot of my contacts from my college years (early to mid 2000s) over time on social media. Almost no one today from that cohort is with their college era partner. This also coincides with the Millennials having poor social skills and the rise of internet technology, which worsened the social skills of Millennials. Now that the Millennials have completed undergraduate, Gen Z is the college generation now. I don't expect this to change with Gen Z.
One commonly cited reason about the changing mating environment in college is that colleges are skewing more female with a surplus of females. This might be a part of it but I think there are bigger reasons.
One of the more practical reasons no one talks about is the rise in tuition costs. With tuition costs getting so expensive since the 1990s, college students have to be more focused on making their own decisions and putting their own careers first. If two people do this, it is difficult for a relationship to have longevity. For instance, lets say a man and woman meet, have sex, and form a relationship. If they don't graduate in the same year, one is going to make a career choice before the other. They may take a job in a city not close to where the college campus is located. That would lead to a year of a long distance relationship, which isn't ideal for a lot of people. Many couples would choose to separate then. This becomes even worse if their graduation years are 2 years apart. If they both graduate the same year, they may each get job offers in different cities.
In graduate school programs, what I described above becomes even worse. If you're a woman in an MBA, JD, or med school program, you are likely to be career focused and less likely than the undergrad female to work collaboratively with your male romantic partners.