Not necessarily Friday and Saturday nights -- but socializing with other people is important. There are a number of "good for the startup" reasons to do so -- e

Not necessarily Friday and Saturday nights -- but socializing with other people is important. There are a number of "good for the startup" reasons to do so -- e.g. bouncing ideas off other people, networking with potential VCs / partners / employees, and keeping your sanity. But in order to get the maximum benefit, you'll want to have at least some social time not oriented around the startup. My co-founder and I have keep our sanity by spending time talking about girls, baseball, and TV shows. Not sure if it would work if we discussed social networking and Javascript.