At dinner last evening, a friend of mine was playing with her iPhone, and she had a double double-u icon, with two purple double-u's, one on top of the other, on the screen of her phone, and I asked her what it was, and she said it was the icon for Weight Watchers. And then I thought: "Hey, isn't there a better way to visually communicate the name/idea Weight Watchers?" So it occurred to me that a better logo for Weight Watchers might be a pair of big alarmed eyes staring down at its fat stomach (or maybe down at a scale with feet on it). After looking at that image, the name Weight Watchers might just jump out at you. And once you knew it was for Weight Watchers, you'd never forget what all that calorie counting is for.
(Of course this is a joke, but it would communicate the idea very well, wouldn't it?)