Once upon a time I got together with a bunch of friends to start a Buddhist group. It so happened that we tended to all be followers of the Theravada, were all pretty solid meditators and went to the same sorts of temples. We spent a lot of time together talking about how we wanted to market our group. At one of these meetings I said, “I’d like to think of this as a non-denominational Buddhist group.” There was an awkward silence. A friend finally spoke up, “When I hear people say non-denominational, they usually mean Mahayana.” It was only later in life that I learned that Catholics and Protestants have this issue too.
For some reason, this never fails to amuse me.