About a year ago, a new, familiar-looking coffee shop opened in LA. Their reasoning for this was, basically, that it's making fun of the popular coffeehouse chain and is thus fair use:
Naturally, it attracted a lot of attention and was later revealed that it was really a publicity stunt created by a comedian, but he still made a statement that "as long as we're making fun of Starbucks, we're allowed to use their corporate identity" (as seen here).
Had Starbucks sued for trademark infringement (which they probably planned to do, but the thing was actually closed for operating without a valid public health permit), would the whole parody as fair use thing hold in court (or at least have some relevance in the case)?