I've visited a lot of bike shops in my time.
There have been great ones, and scary ones. One thing I've noticed is that they all seem to have the best intentions. I've never had one deliberately rip me off, or damage my bike because they didn't care.
I have had shops be flat out wrong about things they still swear are true.
So, the question is, if you're new to the area, when you go to a shop for the first time, how do you decide if they are a good shop and you can trust them with your bike and safety and your wallet?