I have a potluck at work today. I'm vegetarian, so potlucks always make me nervous. I usually grab a snack ahead of time, so I'm not left with salad and chips. I made cupcakes (vegan) and have not told a soul that they're vegan ("There's VEEGAN IN THERE?! I"M ALLERGIC TO THAT!"). I'm waiting for the accolades before I spill..
A positive story, at my bf's chrstmas party (while not potluck) was catered by a meat company. I was giddy when I found out they ordered falafel, etc. from another restaurant just for the veg-eaters. I have never felt so loved...
Be yourself, to the extreme!