The problem with showrooms is it is easy to go in, see what you need, then walk out and order from the cheaper mail order place that doesn't have retail overhead.
The other problem is walmart with the generic stuff is good enough for most even though it is measurably bad, in a cheap but measurably bad listening environment - but they can thereby compete with online sales. That and a lot of expensive stuff is measurably no better than the "our best" walmark junk and so if you do find such a store there is no guarantee they are not pushing you overprice junk instead of the good stuff.
It goes back to the old tale of "being too poor to buy cheap boots" that US consumerism has forgotten. We are addicted to cheap stuff, not good value stuff. Cheap is not always good value.
I've found $30 sneakers at Wal-Mart that compare to $90 sneakers from Brooks, they are compatible with my feet like Brooks, they don't last as long as the Brooks but they last more than 1/3 as long.
Trouble is those were only available for a short time, I've gone back and there's been nothing that good.
The other problem is walmart with the generic stuff is good enough for most even though it is measurably bad, in a cheap but measurably bad listening environment - but they can thereby compete with online sales. That and a lot of expensive stuff is measurably no better than the "our best" walmark junk and so if you do find such a store there is no guarantee they are not pushing you overprice junk instead of the good stuff.