Well it's a long story but has to do with force-feeding jazz and blues to a room full of Texas cowboys.
Yes, Gary, I spent a number of years at a piano bar (organ bar in my case). I think it may be an idea past its prime, particularly if you try to limit the music to the traditional piano bar fare.
There used to be a half-dozen or more in this area. Now there is one, and it is mostly background stuff with an occasional singer-a-longer.
Karaoke has replaced many piano bars and many bands.
DonM