You wouldn't readily think 'lets have an ice cream soda' but back in the day we used to visit a fabulous Italian ice cream parlour, we bought one ice cream soda between us and would always ask for a couple of straws and spoons. This wasn't because we were mean but based on trying to save enough money to get married and buy a house. The courtship was 15 months in total and I hadn't even reached my 21st birthday when we married.......on Cup Final Day! Hence two straws and two spoons.......happy days.
We have always made ice cream soda by placing a scoop of ice cream in the base of a tall glass and pouring over a can of cream soda, the ice cream floats and the cream soda creates a lovely frothy top. The Ben Shaws website recommend using a dash of grenadine syrup but I doubt we had even heard of 'grenadine syrup' in those days. I used Mackie's Traditional Ice Cream but there are lots of fun variations. Further information for ice cream soda and ice cream floats can be found on Wikipedia.
I would be really interested to hear your nostalgic story.