I have stumbled upon an invitation to join a gangbang/swinger party (straight). I have never been before to this kind of events and decided to join. I was wondering is there anything particular I should know? What are the common rules? How to behave so you are not felt out of the place?

Previous invitations that I was seeing were about the guys who have a 20cm thing packing down there. This time no one asked about the sizes. Feeling a bit anxious. Are the only people who go there are 3 legged monsters or there are people of different sizes?

There will be plenty of woman and male almost 50/50. Is the etiquette the same as it is in swinger clubs? You have to talk first and ask if it is fine to join or if I was already accepted then everything is good?