Just tried it there. Inputted a saturday night scenario which is approx 8 x pints of 4.2% beer. Consumption commenced at 9pm and nearly 16 hours has elapsed. ...Told me I'd still need to Get a Taxi.
Reduced it to 7 pints and it claimed I was feeling a bit tipsy.
Reduced it to 6 pints and it said I was "not even mellow" (which I assume means stone cold sober.)