I would imagine that some companies would start in the open hacker space with a project and a locker and then grow into a closed office space/work-space. Some others might already need their own space, but would just like to go down to the hackerspace and occasionally borrow/use equipment. Others might have a workshop and use the space as an ancillary lab.

I don't see why we couldn't accomodate all of those use-cases. The noise is an issue, but hopefully we could have some areas that are far enough away/sufficiently insulated from the heavy equipment/socializing to be relatively quiet.