Coming out of the office, I ran into a coworker at the elevator. As we got to talking, I mentioned that I was thinking about going to some vegan Halloween events this past weekend. He cited a friend as saying that the difference between being vegetarian and being vegan was that vegetarianism was a diet whereas veganism is a lifestyle.

I have my opinions, but what do you think. What qualifies as a diet versus a lifestyle? Is vegetarianism just a diet? Is veganism always a lifestyle?