I have a mixed group of friends through a sport. I'm quite strong in the sport, so the people I train with are mostly men, plus one woman with a very hectic social life and one woman who works about 80 hours pw!
I've realised I'm doing the wife work for all of them!
For example, we're going away next month and it's me who's researching transfers from the airport. We're going out tonight and I'm the one who's checked the train timetable, I'm the one who suggests and organises a lot of the outings and often, even when someone else suggests something, I'm the one who makes it happen.
No one's asked me to, it as in my marriage if I don't no one will and we probably won't end up going, or everything would be organised chaotically last minute.
I don't mind, as such. It's my skill set/comfort zone to do it, I have the time, and they contribute to the success of the group in other ways, but it is an interesting self realisation, that I've let this happen.