I'm leaning toward the former since Proctor isn't exactly the kind of guy who lives in an area that has active conventions/events, nor having the willingness to attend it since he would rather tend to his cocks and birds. So he treat anything about "con orgies" as something surprising or some shit like that. Like "every cons all have orgies in it, very disgust" sort of thing.
As someone who semi-regularly went to conventions/events in the Asian side of things, the idea of orgies is just weird to me. It's just like you said, 95% of them con-goers is just there as excuse to hangout with their friends or doing planned stuff like photoshoots or whatever.
While I do know there are con-goers who are horny enough to do the sex either on hotels near the event place or even in the event area, orgies like that just... nothing.
is this really the western/american thing?