Well, you're in luck. The city of Seattle is getting ready to remove their 5 fancy sidewalk toilets because they have become havens for "ladies of the evening" and drug users. They were a great idea for tourist use but the bad apples have ruined it for everybody. They are stainless steel looking and they self clean when you shut the door after use.
The toilets will be removed starting August 1st and be auctioned off on eBay...each toilet will have an auction starting price of $90,000. (that would be ninety thousand). So count your pennies and start watching eBay in August if your in the market for an outdoor toilet.