This is a fun game I play with my specific bike forum, thought I'd bring it here since many of us ride, even if only occasionally.
Premise: Take a picture of your bike beside what the previous tag winner asked for.
Rules: The purpose of the game is to get out and ride, so don't dig through the photo album for the picture of Niagara Falls you took in 1997. Go out and get the tag. Similarly it should be you, not a friend's photo you borrowed from his Facebook page.
Tag is valid for 48 hours, if unclaimed the previous winner may suggest a new, and possibly easier to obtain tag.
For Example: If the previous tag was, "a pic of your bike next to a railway bridge"
The first person to provide the picture gets to pic the next tag. A brief description of where it is would be good.
As the winner of the tag, I would then suggest the next tag: And here we go:
A picture of your bike with at least 4 other bikes.