Bob Koester, who died May 12 at age 88, knew what he liked—and what you should like too. For nearly 70 years, he owned Chicago’s Jazz Record Mart (and the Delmark label), and it was completely in character for him to snatch an album from the hands of an earnest young shopper.

Koester didn’t care. His approach to retail was idiosyncratic, to say the least—the opposite of Marshall Field’s dictum that the customer is always right. And as it went at the Jazz Record Mart, so did it too at the label financed by the store’s sales. He hired people who contributed their own energies to both, but it was Bob’s empire, and he ran it his way.

DeJong, who later ran the jazz department at the Clark Street location of Tower Records, sold music differently than Koester, developing insights into what people wanted and might enjoy exploring further. Koester had slight interest in commercial trends and seldom stocked white or Black pop, rock, and R&B, but when it seemed like everyone coming up the subway steps or getting off the bus in front of the Jazz Record Mart needed Curtis Mayfield’s Super Fly, DeJong kept a box of the LPs under the counter, next to a stack of Miles Davis’s Kind of Blue to offer the uninitiated. Koester was fine with that, and with DeJong’s to-the-penny accounting, though he’d sometimes mess up his manager’s buying plans by appearing before a late-Friday bank deposit to raid the store’s weekly income so he could cover a Delmark recording session or some personal expense.

Blues label Alligator Records has a comparable origin story: erstwhile Koester acolyte Bruce Iglauer founded it in order to record Hound Dog Taylor, after Bob repeatedly turned the project down. The Jazz Record Mart sold Alligator’s releases, of course, as it sold Nessa’s—and whatever else it could procure, often on extended credit. Koester might be temperamental or erratic, but he knew his store needed product the same way his label needed new releases. He bought cutouts to sell at a discount, used collections of vinyl or 78s, and eventually the assets of long-gone imprints such as United, Pearl, Aristocrat, and Sackville, which had catalogs of artists only a deep diver like Koester would recognize as valuable.

Bob once confided to me that he and his bride had spent their honeymoon night parsing Red’s famously salacious lyrics. No doubt he lied, though he had in fact met the future Susan Koester because she was a customer at the Jazz Record Mart—one who took Bob up on his offer, freely made to many, to tour south-side blues clubs with him at a time when few white people did so. As Bob liked to put it: “I always say my wife fell in love with Junior Wells and settled for me.” It seems most likely that this woman, who lived with him for 54 years, with whom he had two children, and who is believed throughout her circle of acquaintances to possess a saintly calm, patience, and sagacity, fell for his directness, spontaneity, and enthusiasm for all sorts of musical languages, even if he wasn’t fluent in them. He always found ways to express himself.

Cliques formed at the Jazz Record Mart, and love affairs no doubt started there. But it was mostly a place to go to listen, browse, and have a chat about music, art, Chicago, life, the weather, the mayor, or anything at all with virtually anybody. Multiple-horn-playing phenomenon Rahsaan Roland Kirk would spend a day there, schmoozing easily with shoppers he couldn’t see. Singer Betty Carter came in to personally sell her Bet-Car albums, as did Alton Abraham, manager for Sun Ra, with a new batch of platters from the boss. Delmark artists showed up for payments. DJs and presenters bumped into each other.