I have 2 I go to, a third, well, DS used for race for them, they actually are nice, have great mechanics, but not really close. I've only been there with other people, lately, looking at bikes.
The first store is the one I bought my bikes from. I only go there if it's something they need to do to related to the Guru purchase. In the past, I have run in there to buy a pair of socks, levers, etc. I did buy both pairs of my new shoes there.
The other shop is just as close, and DS worked there in HS. They also "know" me by name, or at least "Hey, there's Scott's mom." The owners are slightly weird and the male half is not that friendly. They sponsor lots of local charity things. Shop #1 sponsors racers. I have bought more commuter related things there; blinkies, a visibility vest, etc. They carry the only gloves I can tolerate, so I buy them there, as Botranger obviously has price fixing and no one ever has them on sale. We tried to buy x country skis there (another specialty), but they were trying to convince us to buy something we didn't want... and we don't know half as much about skis, so we ran away quickly.
Shop one sells high end brands, some I've never heard of, and Giant. They have a good selection of kid's bikes. They have bikes that cost 15-20K . Shop #2 sells Trek and Specialized, not sure what else. They have a lot of hybrids, too.
Both of these shops are medium sized, in terms of the amount of stuff they have, but they are in smaller spaces. Shop #3 is very big. They sell Trek, Specialized and a lot of other brands, too. A whole floor of clothes and accessories. I never bought a bike there, but DS bought 2 there and they did some mechanical work for us before DH learned everything. The same mechanic is there that was there in 2000, which is unusual.
I bought my mtb at another "large" well known store here. They treated me like a non person and only addressed DH. This was before I was really knowledgeable, and I paid for it later. My bike was too big. DH had bought his Trek there and liked them, but at that point, he was a younger, tougher rider who was very fast. Your typical male buyer.