'Jaws' from the Penguin Horror book series by Tom Lenartowicz I'm a big fan of minimal design for book covers. Most of the letters being underwater like a shark and the top of the 'A' being out like a fin is very clever and effective.
For the larger, one-day events, (basically happening monthly) I like the idea of having a similar event flier design with slightly different features based on the neighborhood, time of year, etc. http://isaurefouquet.com/
Beautiful branding for stylish and modern businesses