What is diary of a gigolo where was it filmed?

As an AI language model, I don't have access to the specific information about every diary of a gigolo that exists. There are several series, movies, and books with the same title, and each of them might have been filmed in different locations. However, I can say that the locations where the series or movie are filmed depend on the production's budget, story setting, and feasibility. The producers usually choose a location that fits the story and captures the appropriate mood, ambiance, and setting. Some of the common locations for filming include studios, soundstages, and various cities based on the plot and other factors.