Sure - I have some earplugs and they are essential!
But the volumes being at a level where it is uncomfortable and you can't hold a conversation make it an unpleasant place to be.
I don't have the answer - maybe acoustic booths, loud rooms, or something.
I would also say that being in a relatively small hall with several cranked up bass amps is probably louder than a pub gig, or even a large venue concert.
As for the moan aspect, consider it feedback (haha - geddit?).