If you're in the Nashville area, Gibson has that showcase in the Nashville mall. There's an area where you can see some instruments getting built and repaired- which is kinda like watching the elves in Santa's workshop make toys.
i was there around a year ago (nashville) and they had a decent store there...they build mandos and banjos and acoustics and etc there...the had an ok supply of guitars there too...electric/acoustic/basses...not a giant showroom by any means but around a dozen LP's and so forth
They must have changed it since I was there a few years back. There were easily 50 different LP and SG's hanging out to play.