How do you approach a guy in the lockerroom showers and ask if you can blow him?
Probably not a good idea…
Guys who really want to be blown, straight or gay, have a natural ability of picking out willing cocksuckers from within a crowd; so if he really wants some head, he’s probably already spotted you as a willing slut that he can use.
My advice is to linger a bit, just to confirm his suspicions (assuming he has any), and then just wait it out to see if he offers it to you.
He may not want a dude sucking on his meat, or he may have one already on stand-by, or maybe he just doesn’t think you are worthy enough to worship his god-like pole.
Just remember that you are the (previously admitted) submissive cocksucker, so all you can really do is sit back and wait to be summoned by whomever has the need to fill up your faggot mouth. Let’s just hope that you remember to say thank you when these Tops of yours are done with your throat, because no one likes a ungrateful whore.