I understand why you asked, though. I've been to topless optional Resorts where women only took their tops off when they were lying down sunbathing. But as soon as they were going to sit up or walk around, they put them back on. TTR isn't like that at all - you can walk around topless without ever feeling out of place.
I dont wear top to go to the restroom or to the bar. I do wear a cover up at the restaurant and if I need to go to my room. Might have happen that i walk back topless to my room cause I was clueless how to put back my cover up. We usually hit breakfast then the pool so I remove my coverup after eating