hinchley
The negative connotations of the word bro appear to be rather US-centric. I am Australian, and I have several friends from New Zealand who use the word bro as a term of mate-ship and affection (I've even heard one friend call his mum bro).
With that said, it's great that people are conscious of the affect of matters like this on the inclusiveness of the community - but in this case, when the word "bro" has such a variety of associations, perhaps we should judge the book by its content, and not its title.
The idea that new starters are "not allowed to sit by themselves in a corner" is draconian, and in my case, it would prove counterproductive. It would make me feel like I was back in school, being told where to sit by my teacher. This is not the mindset you want to instil in your employees.
I think the best approach is to provide a working environment where people have the opportunity to gather together. Those that want to socialize can do so, and those that prefer periods of solitude aren't made to feel guilty for spending time alone.