I'm not currently allowed to go to bars, but I'm so getting me some Grenadine from the store someday to mix with either 7 up or Coke.
Nothing like a good ol Roy Rogers or Shirley Temple, imo.
Squirt (sour) is good to drink on it's own.
You can also just get a 7 up or something with ice, no one will know it doesn't have alcohol in it, if you don't want them to.