Just as an honorable mention, The Georgia bike tour better known as BRAG boasts some of the funniest teams/clubs.
One team calls itself "Team Roadkill" They carry/adorn their bikes with plastic beads much like the ones you see at mardi-gras in New Orleans. Anyway, their fetish is to decorate roadkill along the route. Most people just try to encircle the carrion with a necklace. However, their are some pretty demented people out there. They do things like sit animals in an upright position and usually try to put a beer bottle in their arms. It's pretty gross, but kinda funny too. One year, someone went through the trouble to actually get a couple freshly dead opossums, and sit them up on the side of the road with the "roadkill" necklaces around their necks and beer bottles in their little arms. They were painstakingly positioned on the side of the road so they would look like a couple of macabre spectators. - no kidding. these people are very demented...
Another group is a group called "Team Thrown-Clear" To be a member of their team/club, you must have been hit by a car and survived. Hence the name "Thrown-Clear" Where ever they set up their camping area during the tour, you will most always see a body silhouette marked somewhere on the ground.
Sure wish I was riding BRAG this year.