From my experience?  It's worse than the general population, and the general population is in horrible shape.  I agree that I wouldn't want to see the average 80% of the population naked, but at the same time it wouldn't repulse me.  I mean, not everyone is beach body ready, but not all of them have shapes making you question if they are the same species as yourself.  But some clubs have a good 80% of the people being massively overweight.  I mean, inverted elbows, melting, bloated tick faced monsters.    There is something about orgies that attract the fatties.  Just like Renaissance Faires, comic conventions, nude beaches and theme parks.