Public institutions serve coffee to two groups: staff and visitors. Each needs a different approach.
In a government office or public institution, set up coffee in two places: a kitchen or break room for staff, and a lobby or waiting area for visitors, usually as a self-service paid device. Placement in the building is agreed with the building manager.
For staff
A kitchen or break room with a coffee device, a kettle, and house rules – just like an office.
For visitors
In the waiting area, a self-service device that takes cards or coins works well. The page on vending in public institutions (publisher's site) covers such setups.
Formalities
Placing a device in a public building may require agreement with the manager or a supplier selection procedure. Check the institution's rules.
FAQ
Can visitors use the staff kitchen? Usually not – a separate device in the waiting area is better.
Who decides on placing a machine? The institution or building manager, per their own procedures.