USMC - Pint Rules. These apply to all club events, where relevant. Leader pushes their grade. Buy your second a pint, unless you dogged the route and cheated like a bastard.
Leader wimps out on something within their grade.
Second leaves gear behind. Second abseils down and retrieves it AND buys the leader a pint. Second gets a piece of the gear well and truly welded into the crack. Second buys leader new piece of gear if all attempts at retrieval fail AND a pint. Leader buys owner new piece of gear if all attempts at retrieval fail AND a pint.