I experienced what I would say is an exception. I visited a local brewery last year for dinner. After perusing their beer list I selected one (don't remember which, but it was a fairly common style like a Brown Ale or something). When it came it was a sour whatever. No mention in the beer list about it being a sour beer. I did tell the server that it probably should have been noted in the description. She, like she should have, offered to replace the beer so all was made right but I think that is a legit complaint.