[bruinaphi]

Generally speaking, rewarding people works as a better motivator than punishing them. I always advise chapters to have point systems that reward members. This is a lot easier for housed chapters because they can use the point systems for things like room choice and parking. In unhoused chapters, you can set up your bylaws to require people to attend a percentage of events or have a number of points in order to have social privileges and then allow people to make up some points on a case by case basis. You can also reward people by giving prizes to those who have good attendance.