Everyone's had the experience when they woke up without the beer goggles and found someone less attractive than they thought beside them.
If you're lucky, you left while still drunk, secure in the thought that the girl/guy was hot. But then... you dig out your digital camera the next day (i carry
mine to the bar all the time these days) and the hideous memories are all too sharp. Your night has been ruined.
So, I propose an optional mode for a digital camera that will either detect alcohol through the sweat on your hand if possible, or simply can be switched on before you go to the bar. It applies soft blurring filters and shifts the color balance from the harsh blue of the flash to the dim reds you see in the bar.
While it could never approximate the kind of improvements a drunken brain can make on a member of the opposite sex, it could at least mediate the ugliness. Everyone looks better in soft focus.
I'd been meaning to post this for awhile, but only remembered when I saw beer goggles on the main page.