If you ever go to Peru I challenge you to get out of the airport or across the border without being offered one. I went in 2002 and they were not to my taste at the time. As a health conscious tourist I think it was the threat posed by raw egg white that put me off.
That, and being an ignorant western tourist, I spent the four-week trip drinking Pisco with Sprite over ice (unaware of the health risks posed by the ice!). This however was my loss as this is a punchy little beastie and well worth trying.