I was at my DIL's hen do a few weeks ago with my daughter. I was delighted to be asked.
We rented a large house, complete with swimming pool and hot tub and I had an absolute ball, getting to know her family and a few close friends. The rest of the party would not allow me to do anything, as MOG and spoiled me rotten, insisting on daily lateral flow tests, as I was CEV. I was a bit overwhelmed that they were so concerned about keeping me safe.
I hadn't been able to meet them, due to shielding for the last two years, so it was a great way to get to know them all before the wedding.
No drunken orgies, just lots of fun and good food, including a murder mystery night. So much fun was had, that at the wedding a few weeks ago, we decided we are going to have non hen do in the future.