a thermos and nalgene crowd

I arrived at a potluck this week with two liter bottles of soda and yellow plastic cups. Coke and Sprite. I considered purchasing diet (that would've been my choice) but figured more people like regular. I wasn't the only one to bring soda to this gathering of documentary students. But the other person purchased Moxie (a local cola) and rasberry ginger ale. Not a single person drank my offering. And it's not like there was beer or anything. I left with both bottles unopened. I just took a couple of swigs from the neon green bottle and thought I'd write to all of you. Do you not drink soda? Am I living in the past? Do your social groups drink it? I'm just curious.