When I was living in the US, I found a phenomenal Thai massage therapsist. She didn't give a fuck about draping - once she got comfortable with me, a towel stayed on my ass for the first few minutes of the session, and then it was gone. She also never once offered anything other than a truly phenomenal deep tissue Thai massage good conversation, and laughter. Why is this relevant? Different cultures aren't always as prudish about nudity as most North Americans - and lack of draping doesn't always mean that extras are on the table.
I've been to Top Thai once, and ended up with a pretty good deep tissue Thai massage. My opinion (which is worth slightly less than you're paying for it) is that it's very unlikely that there will be anything available at Top Thai other than a legit massage.