Which swinger party is this? The ones I have been to only guys turn up!
This can be the case and I have had this same experience on some occasions, but the number is low out of what must be more than several hundred events over the last few years (1 or 2 events each week).
One venue is definitely male oriented so you have to understand those demographics plus when the girls are likely to attend and be up to play. So events, even when ladies there whether in low or high numbers, have variable dynamics. The venues and their events are best viewed like a private bar/club where the make-up of crowd varies on each occasion. However, unlike a bar the crowd is usually characterised by their like mindedness, a lack of judgement on people's sexual aspiration (when expressed respectfully) and where political correctness and inhibitions are left at the door. (Plus unlike a bar, if you want to hook up and play, facilities, including rooms, condoms/lube/towels etc, are at hand rather than looking for a dark corner or adjourning to the car park or a motel!)
By its nature, swinging is a scene dominated by couples for swapping and polygamous desires. Single girls are openly welcomed either to fill the role of unicorn for FFM play or to satiate a bi female partner's desires (+/- the male's vouyeristic pleasure) . Single males have to work to be accepted and find a niche, to achieve the outcome they aspire for (especially if ur not hung like a horse with Adonis looks!). Otherwise single guys can feel frustrated if they expect to rock up when feeling horny to get a silver bullet outcome.
The outcomes are never guaranteed after all it is not a pay for play arrangement - but I find there is is a setting where there is always great social "intercourse" that is either part of the foreplay on the day which can deliver the amazing outcomes (such as yesterday and frequently) or a longer term investment in some amazing outcomes at a later date ( also common in my experience - eg the two invites I got to future play times yesterday) .
While punting (pay for play) has a greater outcome certainty on the spot, the quality of the outcome can be just as variable and the frustration at having departed with $ for a less than satisfactory outcome, just as great (see the many disappointed reviews spread across TS eg
https://www.talkinsex.com/threads/worst-experience-of-my-life-☹.72680/post-633585).
Thus I am just sharing an alternative that may be of interest to some, but as with any experience shared on TS, YMMV. If it is of interest great, if not so be it.