It occurs to me that Restaurants fairs(such as the Bristol Renascent Fair in Bristol Wisconsin,would be great A.N.Gs..
I presume you mean
Renaissance Faires?
The downside to them as ANGs is, as mentioned for previous ideas, the huge number of staff members that would need to know about the supernatural and how to deal with it. Though you may never know it being a patron, they all tend to have large security and service staffs.
Additionally, they're only held a limited time each year at each venue. Would the ANG status end at the final cannon call of the faire? Or would it persist on the off-season using the abandoned grounds? That would be pretty interesting on fairegrounds with permanent structures!
On the other hand, many (though, notably, not Bristol) are already mostly Fantasy Festivals rather than truly renaissance reenactments. The Wizard, Fairy, and
Other quotient of the many Renaissance Festivals is quite high; such as Michigan's MRF. No one really bats an eye. That would work in the supernaturals' favor.