>Regarding fizzy drinks, there is, in NY and northwards, the egg cream, which contains neither egg nor cream, but is basically selzer or carbonated water and chocolate syrup.

I'm surprised about the chocolate.

I would have expected it to be like a Snowball - the Dutch drink Advocat (yellow semi solid stuff) and lemonade. You can add vodka but that would make it more sophisticated and my ancient aunts who used to drink it at Christmas were purists.