During Prohibition, the simple gin-and-orange-juice Orange Blossom tipple was a big hit among illicit imbibers. The recipe, which is very similar to a Screwdriver, was a perfect way to disguise booze. Try one for yourself to find out why it was such a hit with the flapper set.
@ johnniepop: I'm looking at the orange blossom I'm drinking right now that I made with sweet vermouth (Dolin) and it's EXACTLY the same colour as the picture! However a dry vermouth version would be a nice variant, taste wise anyways.