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Find an existing organized event with proper rules and insurance. Don't DIY this in a public lot. And never, ever let the driver drink.
Drunkhana is not a typo of "gymkhana," but a deliberate, tongue-in-cheek motorsport event. It combines the precision car control of an autocross/gymkhana course with the impaired coordination of drinking alcohol— but with a critical twist: the driver is not the one drinking. Drunkhana
Drunkhana is a brilliant party activity that happens to involve cars. It is not racing. It is not a test of skill. It is a test of how well you can laugh while your drunk friend screams "reverse!" into a wall of cones. Find an existing organized event with proper rules