Yes I agree with all the other posters. Sure if you are getting married in Ireland then I am sure there will be a lot of big drinkers at the wedding, not just him!
I think it is great that he had you for Christmas that time and also there is the fact that he must think a lot of you to ask you to have at Christmas.
Think of it from his POV, he would be heartbroken if he wasn't asked. Also think of you and your hubby on the evening of your wedding, when all the big stuff, like the church and meal are over, and you are out dancing to your band, wouldn't you like to be able to have a dance with him to say thanks?
Weddings are funny things, you have to try and please everyone.....but afterwards would you be able to look him in the eye if you didn't ask him?
I think you know what you should do....