I own several tuxedoes plus some nice patent leather shoes, so I rarely rent formalwear anymore. But I had a nice experience at Al’s this week.

One of my tuxes lost a button — the black-satin-wrapped kind. Unlike many suits, which sew “reserve” buttons into the lining, none of my tuxes have extras. I don’t know the first thing about sewing on buttons even if they do. I was  bummed.

But I decided to take a hail Mary: I brought the coat into Al’s on Oak Lawn and asked whether they might have any buttons that matched. The lady behind the counter said, “I’ll look.” She took the coat back with her and emerged a few minutes later with a button that looked like a dead ringer. “That’s perfect!” I said. She snatched it up and said, “Give me a few minutes.” She emerged later with the button, sewed beautifully onto my coat. Exactly what I needed.

“What do I owe you?” I asked, expecting a $20 fee for parts, labor and instant turnaround.

“Nothing,” she said. “Just remember us if you need anything.” (She even offered to re-sew a loose button on another coat I had with me!)

That’s good customer service. Especially for someone who wasn’t even a customer.