I been in the game a while now and I need to make new goals to keep myself interested. I only had one 3some in my life and it was from cold approach years ago now.
My best guess would be the Philippines. When I was there Alex's method of inviting them straight over worked AMAZING (I'd just make the girls walk straight up to my room, it felt like getting a free escort). Only thing is idk if asians are as sexually liberal as girls in South America for example. In Thailand it was harder to get zero date bangs for some reason.
My method would probably be to ask the matches I get if they've ever had a 3some before/ are they bi/ are they into girls. Then send the photo of a random hot girl she'd be hooking up with (who you haven't met yet), then once she's qualified just invite her over be like "yeah sorry my girl couldn't make it", bang her 1 on 1, get her on rotation.
From there I guess you could swipe on tinder together or just use the same method again on another girl, bang her, then introduce them.
So yeah I guess you'd want the country where:
you get the most matches
has lots of sexually open bi chicks
Girls are happy to come straight to your place
My best guess would be Phillipines, Indonesia, Peru, or Colombia. Thoughts?