Check out flyers at museums & libraries

Generally, the smaller more specific theme-oriented museums here allow for brochures or flyers coming from external venues, so you can find out about other events in town within the same interest. Example: Went to the Palais de Tokyo last night, and even though the expos themselves were closed, the lobby area with restaurant & gift shop were open. I found a rack with little flyers from other art places... including one for a contest I might end up entering. :) Public libraries also tend to have flyer/brochure racks. Keep a look out for them because you might find out about awesome events you would not otherwise discover.