You could enforce social distancing at the convention readily enough, but once an attendee leaves the convention space, the organizers have no actual power. This means that the organizers could, in fact, be completely honest in their statement in one of those “weeelllll technically” kinds of way.
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Of course they were also hosting an event that collected a bunch of swingers in one place during a pandemic knowing full well what swingers collected in a communal space were going to do. So, sure, they enforced social distances during an event that, by design, leads to things that cannot be done in a socially distanced kind of way.