Eh? No.
So, as you know, OP was promised, and paid for half of, a 3 day family holiday.
Her husband then instructed her, after it was booked, that she is to stay out of his way on the main night of the three day holiday so he can get pissed with his men friends. As he will be plastered, this will also mean he's not good for anything Sunday morning. So she gets the Friday night they arrive, knackered. and the Sunday afternoon and night before they leave.
On a holiday she helped pay for. Which she agreed to because it was a family holiday.
As he has now instructed her she is not welcome on his planned piss up, in the house she will be staying in, which is in the middle of nowhere with no bars, cafes, restaurants within walking distance.
She will therefore be expected to sit in the bedroom upstairs, alone. In someone else's house. In a foreign country. On a family holiday.
That is her only option.
She can't just go out because she can't leave her two little children with his 90 year old relative and a house full of pissheads.
She also has nowhere to go and will have no car.
If she was willing to leave her children alone and get into Paris by herself, at night, she would have to take a 20 minute Uber and a 40 minute train. And then back again, of course.
Alone, at night, in a foreign country, assuming she doesn't mind leaving her kids alone with a very old woman in a house full of drunken men.
OP has stated clearly she has no problem with him having a drunken piss up with his mates, but that is not what was agreed to, booked or paid for when he asked her to go on a family weekend trip.
She was looking forward to the family holiday they had planned and that she paid for half of.
So, no. He can either not carry on with his plan of getting pissed downstairs while she sits upstairs alone, or he can go alone on his boys' weekend.
And at a later date, he can then take his family on the holiday he promised.
Easy peasy.