At the Atlanta Civic Center in the early '70s, I saw Pearl Bailey & Cab Calloway in a national tour of Hello, Dolly!
During the "Hello, Dolly!" musical number portion around the orchestra pit runway, Pearl quickly took off her shoes complaining about her aching feet and the audience loved it. I never heard if this was the norm at every performance.
In my enormous collection of theater memorabilia I have the ticket stub, Playbill and souvenir program from this production. Fun show!