I think the difference with what mspallaton is describing and this is she is saying she wouldn't host, which isn't in the least bit rude. We don't have to agree on whether we would like the gathering, just not unilaterally changing it without letting anyone know
I don't see it as being banished, if I were in that situation, I'd assume that I would say hello to people if I were there when they arrived, I might venture to the kitchen for a snack, might even make brief conversation as I was getting food if someone else happened to be in the kitchen at the same time, and then go elsewhere. That elsewhere could be another public room if there is one, a bedroom, or maybe even out if I felt like it. In reality, I'd probably work late or schedule a guys night.
All in all, it can see why some couples wouldn't like this type of activity, but in that case, the solution is not to host, rather than try to change it. Another option if you know your spouse will not like that dynamic in their home is to host elsewhere, a restaurant, bar, hotel lounge, something like that.