Our guild has a night of mini classes each year. Members from the guild volunteer to teach a technique in the span of 15 minutes, like making your own spray starch, binding a quilt, no waste flying geese, how to mark a quilt for quilting, etc. They all have their own table. We walk around and watch them demonstrate their technique. A bell will ring after 10-15 minutes and we go to the next table to see the their demo. It's a very fun night and we learn a lot.