A history of the improv comedy club in Chelsea, Upright Citizens Brigade, which also functions as a Del Close school, and was founded by Amy Poehler and others.
Madame Tussauds' The Ride, a tourist-turned-party bus, proves that all the world really is a stage, and that New Yorkers can actually enjoy an afternoon in Times Square.
You might recognize Improv Everywhere from the annual No Pants Subway Ride or frozen Grand Central. Maybe you've participated in the MP3 Experiment.