I’ve been taking Brazilian Jiu Jitsu classes though not in a "spa". (No spa here in Richmond offers any kind of martial arts training.) Anyway, there are also kickboxing and traditional boxing classes. All of the guys have some sort of shirt on (rash guard, t-shirt, or other). Trust me, many of them are ripped, but they still have a shirt on. Days has strayed from reality and is trying to get your attention in case the dialogue/plot can’t keep it.