Hmm.
Maybe have a points game like before, but upto when you go and have coffee.
The lady in second place must leave her lab coat locked in the locker room when you get coffee.
The lady in last place also leaves her lab coat in the locker. But she must 'accidentally' have water spilled on her when your all at coffee.
Whe she gets back to the lab she should take off the polo shirt to dry
