A friend (of a friend) runs a bike shop and their business model seems to mainly be changing inner tubes. Fixing up, servicing, and selling sporty goods like Triathlon stuff, running & swimming accessories, shoes, cycling clothes, GPSs, turbos, smart watches, gels, hydration tabs* ... and bikes when they can get the stock. A bit of a trendy operation and not your old fashioned LBS fronted by grumpy condescending old bloke, irritated at being disturbed from his wheelbuilding reverie.
I don't know that they're raking it in but I think they are doing OK.
I think they may sell coffee too, I've not been there (or indeed anywhere) for a while. For obvious reasons.
* Basically all the kind of stuff that gets people on here braying and waving their order papers shouting "shame, shame".
I bought a really nice rain jacket from them. It's a running jacket but folds up nice and small. Naturally the first time I wore it I crashed and made a bit of a hole in it.😠