First job was actually at a Hot Dog place because my parents knew the owner, and it only lasted a day, the place in general only lasted a couple months. It was a failure.
But the one I actually count would be working at Six Flags, and I worked in retail there. Good summer job when I wasn't in school, and of all the positions at a theme park, retail is definitely the one you want to be in. Having to deal with customers sucks though, people are assholes especially when it's hot out, people are miserable.