The most important thing is that people who are considering seeing her have all the relevant information easily available. So as long as the correct link is provided in the review, people should be able to search for her and find what they're looking for. Following on from that then, the region it's posted in is of secondary importance but it is probably most logical to post it where you actually saw her, especially since you might mention a bit about the location/premises which of course would only be relevant for where you actually saw her. The downside is less people who might benefit will "stumble" upon the review, nonetheless this is not of primary importance, as they weren't actively looking for info about her.