If one really want to check off the orgy from your list, one should go to the Phoenix Club in London, UK.
https://thephoenixclub.london/hostesses
I had the good fortune to attend one of their parties about four years ago. They host three "parties" a day at a flat in a safe London neighborhood. You just call them up to schedule and they text you with directions. You show up fifteen minutes prior. They have a place for your to disrobe, hang up your clothes, stow your valuables in your own big Ziplock type bag, and provide you with a robe. You take a quick shower. You then go into a room where there are some snacks and bottles of water. The seven of us guys were then introduced to the five girls who were at the party that day. With formalities concluded, we moved to two rooms, one with three beds, one with one. The robes came off, and it was on. There were bowlfuls of condoms and bottles of lube on the bedside tables. So, basically I got to fuck five attractive women over two hours for 160 Pounds--about 200 dollars. Plus you get to watch everybody else fuck. Definitely bucket list material.