It's been present in the last three places I've worked. At one, it was definitely the "after 4 on Fridays" type of thing (115 person company at the time), at a

It's been present in the last three places I've worked. At one, it was definitely the "after 4 on Fridays" type of thing (115 person company at the time), at another it was the "start at lunch and go till the end of the day" type (8 employees, bad work environment outside of the beer), and at the last, it was pretty much in the fridge and the same regular group would grab one at 3 or 4 every few days or so.