Many law firms in Manhattan have vacant offices within their suite that they are not using. These private offices are just sitting empty, collecting dust. There are lots of reasons why law firms could have excess office space. Maybe the firm has downsized over the years, or perhaps they rented a larger suite than they needed in order to have room to grow in the future. Whatever the reason, many law firms rent office space to sole practitioners or small law firms who need office space to run their business.