Edit: too late.
Depends on number of brakes, he could have two mechanical brakes as well as his fixed wheel.
I wouldn't recommend riding single brake (which you effectively are without foot retention) especially when going for a drink!
I have these on my polo bikes, good for spds and can be used with normal shoes without any trouble:
https://www.google.co.uk/shopping/product/4015860325859901018?q=spd+pedals&client=safari&hl=en&biw=480&bih=268&dpr=2&sa=X&ei=DetfUrr4EIXHsgbTtID4DQ&ved=0CGEQ8wIwAw#hsec:overview
@Khornight2 started
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Edit: too late.
Depends on number of brakes, he could have two mechanical brakes as well as his fixed wheel.I wouldn't recommend riding single brake (which you effectively are without foot retention) especially when going for a drink!
I have these on my polo bikes, good for spds and can be used with normal shoes without any trouble:
https://www.google.co.uk/shopping/product/4015860325859901018?q=spd+pedals&client=safari&hl=en&biw=480&bih=268&dpr=2&sa=X&ei=DetfUrr4EIXHsgbTtID4DQ&ved=0CGEQ8wIwAw#hsec:overview