Don't forget furniture for those social areas you've been thinking about. Air and temperature Give people fresh air to breathe, don't crowd them in. Provide a way for the smells to disappear. Think about ventilation ducts with fans. Windows are great, but sunshine streaming in makes the place hot and glares up screens, so think shades or blinds if you have sunny windows.
Machines generate heat.
So do people. Putting both together in a small space can make the temperature intolerable to both. Think about air conditioning. Air conditioning has another benefit. It brings more people into the center when days and months are hot, and who knows- they may find something to make them come back.