Our guild is doing two challenges this year in preparation for our quilt show.
The first is an orphan block challenge. You bring in 6-10 blocks in a paper bag, put it on the table, and take someone else's blocks. ALL the blocks have to be used on the front of the quilt.
The second challenge is a red and white challenge, because our auction quilt (which is amazing) is red and white. It is just what it sounds, except you can only use one red fabric, and one white fabric. That threw a lot of people.
It is my first year in the guild, so I don't know what the rate of participation is.