As usual, "it depends"...)
You should understand, what is poker for you, and why your partner wouldn't see poker in your family life. Probably you addicted by poker\gambling\games? Or your bride or groom will not allow you to have any hobby if it will poker or not? There is a lot of possible situations, and different variants to solve it, but...
In any case I think that you shouldn't marry if you have such disagreements, before it will be solved in compromise way.
Otherwise you have a huge change to have serious problems in you future life and matrimony. In any case - first few month and, probably, years of your family life - will not solve all your conflicts and problems easy, this month and years will show you and your spouse all of this conflicts and you will get burden to solve it)
In short terms - I would prefer to get timeout, get consensus and after that also get few month timeout, to determine and solve other potential conflicts) Only if you 100% sure that you will be able to solve all this problems together - than you ready to marriage.