For example, I work for a medium-sized software company where employees tend to be fairly athletic. We have groups of runners, surfers, soccer players, tennis players and softball players. We have a licensed yoga instructor come in twice a week for yoga lessons (paid for by the company). We even have a group of people who participate in sailing races every week on the CEO's sail-boat. This aspect of our culture makes it very easy for new hires to quickly make friends and feel like they have become a part of the company. Also, all of these sports are fully sponsored - all sport-related expenses can be reimbursed.
Last year, management approved building showers on the first floor of the building for the sole purpose of making it easier for lunch-time runners to clean up before going back to work. The effect was immediate: many more people started running at lunch time, as they no longer had to worry about being sweaty and stinky after lunch. The showers themselves are a very small perk, but they reinforce the perception that management cares about and supports the active lifestyles of employees.
I somehow doubt having a "Whiskey Fridays" would have the same effect, as we don't have many heavy-drinkers at our company. But one of my friends works for Zappos (based in Las Vegas) and I'm told that everyone there drinks at work. Makes sense, since it's Vegas.