The pub is the hub—I have heard that somewhere before—and why should not it be used as a polling station? I often hold surgeries in different pubs across the constituency of Mid Dorset and North Poole. It seems to me that that is a perfectly reasonable place to hold them.
Concerns have been expressed on Mumsnet that nativity plays and the like may be interfered with. If that can be avoided, I would certainly support that.