I am working on a small piece about a real American city. No names mentioned, but everyone has heard of it, I'm sure. For numerous reasons, including authenticity, I need to mention some concrete businesses there. Coffee shops/restaurants, mostly. There's also a very brief mention of a certain powerful dot com. It's definitely not in a negative tone. Does any of that spell legal trouble? I know there has been a mention of libel in one of the other recent threads. E.g., a rather unorthodox character appears in one of those places.