I'm meeting three life-long friends who I rarely see for dinner next month, none of whom are vegetarian. I am vegan. I would like to find a good restaurant with an atmosphere conducive for comfortable conversation that gives me something to eat. I'm familiar with the vegetarian choices, but I'm having a hard time finding non-vegetarian restaurants that offer even a single vegetarian option. Everyone is staying in around Union Square or in the Financial District. Something in or near these areas would be preferable, but I'm open to suggestions that stray a little bit beyond.