Comfortable and plentiful seating is the single easiest way to make visitors feel comfortable and welcome.
Seating can be a part of the exhibition. This is a space in an Asian museum.
This historical exhibit from the Oakland Museum is a reproduction of a military transport plane taking troops from Oakland to Vietnam.
Seating in non-exhibit areas is critical. The lobby of the Guggenheim Museum in New York City is a great place to rest, or just sit and watch the crowds.
Here is an example of cruel irony at MOMA. Chairs on display everywhere, and no place to sit in the entire exhibition.
Why not let visitors sit on reproductions of these award-winning chairs?