They can be hit or miss. I would never go on a cruise for the sole reason of finding hookups, so if you get one, it's a bonus.
I have a couple of good memories from the same cruise.
A couple of years ago we went on a cruise with another couple who were social friends of ours. We had never swung with them at any time.
One day, mid morning, somewhere out in The South Pacific, Lani asked me to go to the bar and get a couple of beers.
"you feel like beer"? I asked, "yes, we'll sit out on the balcony and have a drink before we meet the others for lunch" she replied.
Ok i thought, that's a first but no problem so off I go.
Probably about 10 minutes or so later I returned and saw Barry, the husband of the couple we were cruising with, sitting on our balcony.
Hi Baz I said as I approached. He appeared to be shirtless and had his hands folded behind his head.
As I got closer I realised that he was completely naked and Lani was kneeling in front of him deep throating his cock.
I sat down on the other chair, he looked at me and smiled, I handed him a beer and said "this was obviously for you". We clinked bottles and sat looking at the ocean, drinking a beer as Lani sucked his rock hard cock and sucked his balls until he unloaded in her mouth and then she did the same to me.
"Life is good" I thought.
He apparently made a move on her the night before and she told him she'd blow his cock the next morning but he had to go along with her plan to surprise me.
He fucked her a couple of times during the cruise after that. Miriam, his wife, never knew and still doesn't.
On another occasion I was out in the Casino with Barry and decided we'd go and get the girls and go to a bar and have a few drinks.
Barry went off to his cabin and I went to mine.
When I opened the door, because the ensuite blocked a view of the top half of the bed, all I could see these bare legs in the air and this bare ass bobbing up and down between them and the unmistakable moans of two people fucking.
Neither one missed a beat, they just kept on grinding.
I stood behind and watched this guys cock pumping in and out of her and said, "hey babe, Baz and Miriam want to know if you want to go to a bar for a drink"? "I'm a bit busy at the moment babe" she replied. "how long will you be" I said trying to be annoying. Then unexpectedly the guy said "give me half an hour and I'll be done". "Fair enough" I said and headed for the door as the flesh on flesh slapping and the moaning seemed to get louder.
She found us at a bar about 45 minutes later.
She met him at a bar while we were at the casino and clued him in that we were swingers and it would amuse me if I came in and caught them.