In Canada, this is known as a float, and root beer is probably the best-known soda used. I have fond childhood memories of root beer floats at the A+W drive-in.
My favourite was always lime fizzy with vanilla icecream.
We have these in Australia too. I think traditionally the soft drink was lemonade with vanilla ice cream, but I love them with all sorts of mixes. Cola is a great mix with vanilla ice cream, so is creamy soda - just about anything goes though. If anybody has never tried these, you are seriously missing out!!!!
I love making coke spiders for Dave and myself and make them often. As a kid I remember my grandfather taking me to the local corner store at Sydney's Manly Beach and they made 'the best' lime spiders. Real lime flavour. These days we always stop at the Ginger factory on the Sunshine Coast for their ginger spiders. Ginger icecream with ginger beer. Yum!
The kids had this today & loved it! We often make these in the holidays, even when the weather isn't that warm - it's just one of those things that represent school holidays to us :) We prefer French Vanilla ice cream with Coke or raspberry (or both) but I haven't found French Vanilla ice cream in Australia yet so I just stick to vanilla. YUM!