very true naomi, my apologies, you were looking forward, I should have realised, my apologies.
sara3, It all depends you see, on how strict they are,
As naomi mentioned, Jews are not alloed, according to the Kosher laws, to eat milk and meat together, that means that in >b>practicing Jewish homes, there's one complete set of crockery and cutlery for meat, and one for milk and foods that aren't associated with meat, that includes tea towels etc. they are also kept in seperate places. seperate pots and pans for cooking also.
When visiting a non jewish home,, it has been known that Strict Jews will only eat and drink from paper cups and plates,
The reason for this, is that they can't be sure what had been on the plates before, and ordinary washing up liquid wouldn't suffice.
However, apart from the very religious, in answer to the original question, taffinnorfols guests probably wouldn't mind, but I still think its worth an ask.
I took my wife and her sisters whole family to a restaurant, my wife went vegetarian, as did I, but that was out of respect, unfortunately, I ordered first, they all had lamb and beef.
To explain, I am only Kosher at home, my wife is all the time.
Hope that helps a bit.