As for human companionship, sunlight and air: as someone suggested earlier, join the Sierra Club, go for a hike. Hang out in a cafe now and then. Hit on chicks. Take a class, get a hobby, get a life. Explore the world. If the work environment is your customary sole source of social interaction, you can do better.
Not sure why no one has suggested the obvious before now- PUBCON!
There are also lots of other more frequent interaction/networking opportunities- your local Chamber of Commerce, local networking clubs (usually meet for breakfast or lunch once a week and share leads), Toastmasters, lots of technical/business organizations, etc.
[edited by: LifeinAsia at 3:19 pm (utc) on May 2, 2007]