All of this, from one poster, shows a total lack of understanding of how business sometimes has to be conducted using private money instead of an expense account - and it seems to get more and more shrill as the discussion goes on:
"He basically stole half a grand from his wife and child to buy sexual services for "clients"."
"Most family current accounts will be in trouble if £500 is taken out of them without prior agreement."
"It is stealing to take hundreds of pounds of shared money without agreement. Particularly when you know that agreement would not be forthcoming."
"I have blurred lines between my personal a business spending, but I don't take money from my family to buy sexy treats for men I'm trying to impress."
"he shouldn't be spending that amount of shared money without agreement."
Most family accounts would be in trouble, but many would not. Fewer still may not even notice £500 go. If one is to accept that one's partner has to pay hundreds on expenses for their job, then agrement each and every time is neither practical nor desirable - my DH couldn't contact me every time he has to pay something and, due to where he travels (often the other side of the planet) I wouldn't want him to call me in the middle of the night. But then his company refuses point blank to reimburse expenses from strip clubs - and, indeed, casinos. It didn't used to be the case, but it is now.
So there's the rub - will his company reimburse these expenses or not? If not, then it IS family money. If they will, it can't be considered so as it's only a part of the transient cashflow from his company.
DH knows of one colleague who, a good few years ago, was pressured to take clients to a strip club - pressured by the clients. He acceeded to the demand. So, is your DH leading, OP, or is he acceeding to the demand of the client?
There's a difference, like it or not. And maybe, indeed, he needs to stand up and say no. But I could imagine that to be a very difficult thing to do if hundreds of thousands, millions or, as was the case with DH's colleague, billions were at stake. And yes, he did get the deal.