I'm not sure if it counts as nudity since there is just one unexplainable evidence* that is in conflict with my and my friends' memory.
We were drinking on my friend's boat, docked at a small town rich on night life when somebody bet me a beer that I wouldn't wear mankini under my jeans and do a strip show in some club. I said I'd do it if each of the 7 people on board bet me a beer and they did.
We went to some club that was nearly empty and I happily started dancing only to be interrupted by my friends. That wasn't enough for their beer.
A friend and I separated from the group at some point to get more booze at the boat. While we were there, I convinced my slightly intoxicated friend it would be a good idea if he dressed in mankini as well and surprised later.
We joined our group again at a very lively and quite populated restaurant / bar with a small dance floor in the middle. There were 50-100 people, but nobody was dancing. I was pretty pissed so I didn't that and started dancing. Before I realized I'm getting some attention I was surrounded by a circle of people. I removed the rest of my clothes which left only with my mankini and manfur. I believe I danced playfully, pulling people from the group and just having a blast. Some bold mates joined me along with my friend in his mankini and the dancing floor slowly became saturated with all people. We left the parquet and dressed up only to see the security confront some fellas who removed their shirt. I thought we're lucky they didn't come earlier, but later we learned that both the staff and the guests thought we're hired Borat dancers.

Now the naked part. I don't remember removing my mankini, but a friend of mine took photos and there are photos where there is no mankini on me. It is a mistery to me.
* English is not my first language and I appreciate it when people point out my mistakes.