The coffee was served by a lady in an advanced year, a bit senior to me, who was extremely cheerful and attentive. She showed no sign of weariness from her work. Or rather, she was full of joy and pride in working and making her customers happy. Her posture was upright, and her speech was clear, giving a clean and fresh impression. 

 I then took a closer look at the counter and noticed that the senior ladies were positioned at the front, to be in direct contact with the customers, while the younger staff mainly processed orders at the back. 

As I was about to leave the space allocated to the Mac in a local supermarket, the serving lady approached me and politely and cheerfully said, "Let me clear your tray," offering her hands. 

After this satisfying and awe-inspiring experience, on my way home I felt a sense of hope and optimism that getting old is not something to be punished or avoided at all costs (as recent comments have suggested), if I may exaggerate a little.