There’s a rule of thumb in the hackerspace community – hold your open house on Tuesday. It’s completely arbitrary. No matter what day of the week you do pick for your open house, there will be someone who just can’t make it. Many just pick Tuesday by convention and no more thought is needed. Unfortunately, it makes it hard to visit other spaces since members generally want to be at home base for the open house. But since I was out of town with no hopes of making it to Kwartzlab, I had a perfect excuse to take a Tuesday to visit Hacklab.to.