It all depends on the tops at the bath house. I see so many posts on here about being kept well in shape, but I've seen many tops who only like bigger bottoms. In fact one gay couple I know are both tops, and the one likes thin boys, but the other calls them MONSTERS. The second gets upset when he sees a larger guy, then months later the guy has lost a lot of weight.
So, it ALL depends on the tops there. I've seen some heavy bottoms who have gotten lot's of action, and some thin, decent shaped guys who have gotten none. But the laying in the dark, with the lights low, face down can help increase your chances. I've seen well toned guys, who have looked like models, look into a room that had a larger guy in there face down, then look down the hall to see if anyone was watching, only to quickly go in, and close the door behind them, so no one could see. What a shame. Vanity Kills, as ABC use to say.