Attractive Switzerland girl on bed (near me!)

When I was in hostel in once, and these two Switzerland girls checked into my room(two bunks and an ensuite), one was really hot, the other just okay looking. We talked a bit and they lay on the bed. Then they started giggling as they were talking. It was really tempting to see them giggling like that while lying on the bed. I already had got laid a few nights before this in another hostel.

I knew that if any of my mates knew I was in this situation, they'd say 'go for it'! I couldn't think of anything to do that could potentially lead into any sort of sexual advance. Sometimes the next natural thing to do/say just comes to your mind but sometimes it doesn't. What would a player do in this situation. I know it's a bit naive to think that even if I did play my cards right, that I might have ended up having sex with in moments. But I just felt like there was something I could have done. What??????