http://www.herald-dispatch.com/news/restaurant-improperly-collected-city-sales-tax/article_a7ce0e2a-8c8f-11e8-b935-4b0f81f59402.html
In other words, make sure you're actually within a local jurisdiction's borders before you collect the tax. And buffets should watch out for parsimonious customers who will complain about an extra 1.17 in sales tax on their bill.