I had a friend call me to tell me that her husband wanted to join us for lunch, as he was off that day (later divorced husband and working on removing the Dear from DH at the time of the lunch). I called my husband to make it a "couples lunch" since it was not going to be possible to stay on the "girls' lunch topics" (sewing, kids, embroidery, female health issues - aka perimenopause, and the like).
It turned into her husband bragging about his taste in cars, his ability to make money on the stock market, his new job, and so forth & so on. After ordering, about the only the thing the other three of us said was "yes, please" if the waiter asked if we wanted a refill or to excuse ourselves to the bathroom (we went to the ladies' room together to have three minutes to chat - main topic was "we are never going to have anyone else join us for lunch now that the kids are too old to take to Chuck E. Cheese to play while we chat").
My husband let me know that he liked her - what he'd heard of her conversation before her husband got going full spate on HIS choice of topics (it wasn't a conversation because no one else could say more than three words) - but that he would NOT be joining us again if "Joe" was coming along. I told him that she & I had already agreed not to go to lunch if "Joe" was was going to be there.
It's been six or seven years and I still cringe at the way he monopolized the "conversation".
R may have been a "tool" - or looked like a "fool" - but he's neither the first man nor will he be the last to think that he'd like to be the only guy at a "girls' group". You have to wonder what they are thinking....