First of all, I am really interested as to what type of business can function profitably if the sound of a mechanical keyboard is disruptive?
I discoverd long ago that those that complain are because they are intimidated by the "busy" sound of someone using blues (or even hitting rubber domes hard) as anyone typing on blues sound as though they are getting a bunch more work done than anyone else. --- Not noisy, but you can hear work being done.
I solved this by eventually buying MX blue keyboards for every workstation in my office. Not only does everyone love them, most have bought them for home use also, and productivity went up as it's noticeable if someone is wasting time instead of working.
For new people coming in, I offer them any number of keyboards I have with other mechanical switches (red, brown, or alps), or any of the rubber dome boards that are lying around, and no one has ever chosen anything but a MX blue switch board for their permanent board. --- To be more specific, only the Ducky's are finally chosen, not the Filco, Das, Coolermaster, Rosewill, or Keycool!
As a last point, I always had a few rubber dome boards in reserve as at least one or two a year would have problems (which is expected in a heavy typing business), but I have never had a problem with any of the mechanicals in several years of heavy use.