I think the 4th event was Ride Smart (bikes...bleh), not David Murray.
Drivers Edge requires a special tech which has some increased brake service requirements (thicker pads, fluid not older than 3 months), newer rotors). I guess we are not allowed to bring food and drinks in BUT COTA concessions will be open.
2015 F34 328iX GT Glacier Silver
2011 E90 M3 Monte Carlo Blue
2004 E46 M3 Imola Red