Mildred's is a safe bet, as non-vegans will like the food, too.
Srsly Oliver, have you ever met any meat eaters? You take a bunch of randoms from any average workplace to a vegan place, they'll put in a complaint to HR.
I've taken numerous meat-eaters to vegan or vegetarian restaurants, yes, including Mildred's. Not work colleagues, admittedly. You just tell them a place has delicious food. Sure, it wouldn't work for every vegan place, but Mildred's has a formula that seems to wow people.
Srsly Oliver, have you ever met any meat eaters? You take a bunch of randoms from any average workplace to a vegan place, they'll put in a complaint to HR.