It seems to be fairly commonly accepted that when serving dinner to someone with dietary restrictions you should try to have an option that they can eat. But what about the other way around?
If vegetarians are going to be hosting a party, should they be expected to have meat available for the omnivores? What if it's something that's encouraged by their religious background, such as Hinduism or Mahayana Buddhism? How much of a difference does it make if its a catered event versus being cooked by the hosts themselves?