Back in the 90's I had an old 45 record jukebox in a little diner of mine for about 5 years..
5 plays for $1.00 It was a free loner from a man I used to work for. I bought the 45's from a store that sold old LP's in town to keep the music selection rotated.

I was well aware that the newer CD jukeboxes all the other businesses had exhibited BMI stickers with some kind of small print claimer explaining the mandatory requirements of it being displayed..
My old jukebox had such a sticker, but it was well expired, and I didn't give it a second thought. It sat there for 3 or 4 years taking in enough quarters per month to cover my electric bill (which at the time averaged about $500), but eventually a customer, who happened to be somehow associated with one of the amusement companies that supplied jukeboxes to the area, began giving me all kinds of grief about my jukebox not having a current license on it. - He was drunk and belligerent, and I pretty much brushed him off.
A week or two later, my landlord who also operated the bar in the back showed me some kind of threating letter he received in the mail, and told me to either get it licensed or get the box out.... I opted to get it licensed, which wasn't much, less than $100 if I recall right.
The whole point is that for me to legally play that old music in a public 25x15 foot room, meant I had to get a license, because it was for public consumption.. You might be barely able to hear it if you were across the street.
But there is no denying that the legal requirements of public presentation of copyright music is there.
So then, If my part 15 station were to consist of copyrighted music programming, and
it was not as a commercial venture. would I pay BMI?..
Honestly, I don't know, it would depend on my pocket, and if coming up with that $250 a year cost would hurt me or not (sometimes $250 can be a lot).
If it were a for-profit station, then definitely.
But what you all do is up to you, but if the emphasis and concern is that of
legal broadcasting (as it should be), well then, it's just as relevant as the length of your antenna.
Or you can just kid yourself.
www.bmi.com/licensing/entry/radio
Here is what RadioPilot, a member at part15.us does, and had to say about the matter:
"..... I have recieved my licenses from BMI, ASCAP, and SESAC...
The BMI license is $200.00yr from the time they grant you the license...
The ASCAP license is $123.00 and it's for one year also... they say the LPFM license was the form to use.... the SESAC license is $85.00 and it's for one year... so I think these are reasonable fees... The BMI license states that any station earning over $10,000yr in commercial fees must revert to a regular license.. which is $450.00yr +... depending on your earnings for the year... or how you decide to 'hide' the earnings.... I intend on making my station earn it's keep by having commercials so the advertisers must be protected from liability from using music on the air... the fines are pretty steep and I would consult an attorney before you attempt to air music outside the boundary of your yard... This is my take on this and I feel that having the licenses helps to protect you from the big boys calling your station in to BMI, ASCAP, and SESAC.. which will get you into hot water.... Radiopilot"
http://www.part15.us/forum/part15-forums/general-discussion/copywrite-fees