I don't have a name for this (I think you need to do something twice before it's worthy of a name).
What I like about this drink is that the spiced rum and orange juice work together in such a way that the resultant flavors are not identifiable. You would not say it's a fruity drink or a creamy drink. You just can't put your finger on it.
1pt Orange Juice
2pt Spiced Rum
3pt SOUR MIX:
Mix the above in a cocktail shaker with ice. This froths the juices slightly giving a fuller texture in the mouth.
Pour into 2 glasses (or one big one) and add seltzer/club soda to taste. Using about twice as much seltzer as everything else (so about 12 parts in this case) seemed to work well.
Orange Juice: The juice here is a flavor, not a base, similar to how you would use something like Grand Marnier, or vermouth in an American-style martini - The martinis I had in France had more vermouth than vodka
Rum: I used Captain Morgan-brand spiced rum - the spices complimented the orange juice very well
Sour Mix: Sour mix is really just equal parts simple syrup and lemon juice (or other acidic flavor). You will have lots of sour mix left over. Just keep it in the fridge. It tastes better than what you buy in the store and has no HFCS.
Simple syrup is just equal parts sugar and water. You may want to heat it in order to guarantee that the sugar dissolves, but that isn't necessary.
Sugar: I used less-refined cane sugar from a co-op food store, which gave the resultant syrup a light brown color. Brown sugar could be interesting
Another way to make it, without making the sour mix separately is:
1 jigger sugar (use agave syrup or confectioner's sugar, otherwise it may not dissolve entirely)
1 jigger lemon juice
1 jigger orange juice
2 jiggers rum
(the water was omitted, but we can make up for that by using a little more seltzer)
One 12oz can of club soda