The 1st place I remember was a SS Kresge's in Beloit WI, the box display of 5, 10, 15, and 25 cent gliders and rubber powered planes, kites and plastic kits.
Then a few shops in the Wilmington NC area my dad took me to but they were too far to ride my bike, so mostly it was plastic kits from the 7-11 ( imagine a 7-11 with models!).
My first Hobby Store hangout was a little place on Main St in Roswell NM. I went there 3-5 time a week to thumb the magazines, drool over the kits and wait until I had a $1.95 for a Sterling 1/2 A profile warbird.
Finally- Benners Bike and Hobby, downtown Grand Forks ND. They had it all, bikes, model kits of all types, science stuff, a huge slot car track and rental cars, plus a whole annex just for balsa kits FF / CL / RC, engines of all types, Aero - Gloss Dope, Ambroid, Sig-ment, Silk-Span you name it. The guys working the annex would let me open kits and look at the plans, put props on engines and flip them over, read the magazines, pretty much anything to keep me from asking them another 20 questions. It was a sad day when I saw the Gong out of Business Sale sign.
Good times back then- but good times are still around , just gotta look a bit harder.