Gang bangs

We went to Hamburg in Germany for long weekend and as we walked about we wandered into a sex club. Being curious we took a walk around the various rooms to see what was happening. Before that night the best numbers involved in a gangbang was 15 which happened and was not planned. Wife took a look round one of the rooms and there was a sex swing in the middle. I strapped her in and men would look in and see wife's legs open and ready to be fucked. I left the room to look around again with a line of 5 guys waiting to take there turn. I kept looking in very so often to try and count how many men she had. overall I think on a rough count 20. We still chat about that night and wants a repeat.