There is physical attraction and i know she would most likely say yes. Can i message her and be like hey you down for maybe fooling around one night? Or is that a big no no
That would be kind of a lame message. Plus it's totally not confident "hey you down for maybe fooling around one night?". Puh-lease. If you want it to happen, be a man and make it happen.
That sounds like the most ridiculous way to ever ask that question... Why dont you just try to convey the emotion you feel for her or is there nothing there?
It really depends on your relationship with her. This is a delicate situation to begin with, but I'd say try it. BUT ONLY IN PERSON. And 'maybe' doesn't really strike te right tone for fooling around with a friend. Just straight up ask. Something like: "I want you and me to fool around one night soon, just for fun. What do you say?"