I'm fortunate enough to travel for work and have taken a girl I really like with me. We got in on a Sunday, chilled out, had a really nice dinner and back to the room. I worked a day and let her get out and see sights, then we had a nice night together, then a day just spent in the room. Nothing.... exciting like some of the ideas here. Just 2 people really really into each other ;)
Relationship with this one is less transactional, not a relationship but maybe a couple of days of pretend.
All I know is I had a big smile on my face and she texted me she had to put her foot on the floor because when she got home she thought the bed was moving ;)