Being I was an active swinger for many years, both as a couple and a single male, it may sound sexist from the outside looking in. But, actually there’s a good reason why single men are not allowed at swinger clubs, resorts, cruises, house parties, etc.
Probably 90% of single males think it’s just a fuck fest and can stick their dick in anything you want, which isn’t true. There’s still gotta be chemistry and attraction believe it or not. Back in the day, they called single males DSMs (Dreaded Single Males) lol. For good reason tho cause they’d get drunk, unruly and start trouble.
I’ve not been on a swinger cruise, but if you’re looking at it online, it’ll surely say couples only or single males allowed. I’ve been to Desire Cancun several times and it’s couples only. Hedonism in Jamaica allows single males. So there are options for single males to join the fun. Just be respectful, let the pussy come to you, and when it does, make sure you fuck like a porn star and you’re in lol.
And yes, Abbie is correct, an upside down pineapple is a subtle message that they’re swingers.