Bottom line: I don't like having my friends relegated to, say, pitiful garden salads while I'm chowing down on a huge burger or something. I can compromise.
That's where HappyCow comes in.
With listings of vegetarian and vegetarian-friendly restaurants and businesses throughout the world, this site is particularly handy for those who are traveling and need to find a place to eat. For friends of vegetarians, you can use it to locate nearby restaurants that can accommodate the dietary needs of your entire party.
The site also offers recipes and other resources that you may find handy and interesting. Go give it a try!