Tony Hsieh from Zappos.com is in this piece interviewed about company culture. I often get tired when I hear the word culture, because so many companies talk about it but rarely makes it to more than nice words (or if used, then only in a negative way to tell people they don’t behave as expected), but Tony gives an example of how culture can be used in a positive way to make a difference.
I really like how the free lunch is used to get employees to interact with each other and not just as a benefit. I have seen it done in a company I worked for and it worked very well, people talked across organisational boundaries and ideas were discussed. BTW, a free lunch is cheaper than a one off company wide team building, maybe less fun but I actually think it is more effective.