Selling a person a bike without FITTING the bike before he/she leaves the store... it just downright irresponsible on the LBS's part.
This is why we buy $600+ bikes, and not the the $100 Wal-Mart special. We buy a bike that fits our body.
When I first bought my bike, I told them I wanted a bike computer. The LBS sold me on one without cadence saying that only racing pros use cadence. WRONG! Any person who rides a road bike and wants to improve and know when to shift up/down should use cadence. So, I ended up spending $60 on computers, vs. just $40 if I had purchased the one with cadence right off.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather, to skid in broadside thoroughly used-up, totally worn out, and loudly proclaiming: WOW WHAT A RIDE!!!!"