A mate of mine would drink for free every St. Patricks day.
When the pubs get busy, the bar tops would be lined with pints of Guinness that are settling, waiting to be topped up for customers.

When the staff weren't looking he'd reach over and take one. He was never caught.

On one occasion he walked behind a busy club bar, wearing a black shirt like the staffs uniform. He managed to get two bottles of cheap wine, six bottles of Budweiser and a pack of crisps, and just told the person that questioned him that they were to fill an order at another bar in the same venue.
( Muns, Fri 8 Nov 2013, 16:29, Reply)