Registration REQUIRED and there is limit of 120 people. Registration closes May 30th (this event will most likely sell out prior to that date though so register early!) No "day of" event tickets will be sold.
http://www.orbike.com/servlet/com.gcm.servlet.event.EventView?commodityID=24555&command=cp&supplierID=369
http://www.orbike.com/servlet/com.gcm.servlet.event.EventView?commodityID=24555&command=cp&supplierID=369