I'm writing a bio for a friend, and I mention many hotels and restaurants, some of which are foreign. Should I use italics?
I would say no. Here is a quick guide on the correct usage of italics. To summarize: Don't use it for the proper noun. They example they give for a restaurant: if you write about a certain dish you ate that might not be commonly known, italicize it, but do not italicize the restaurant name.