| Abbreviation | Definition |
|---|---|
| BJO | Brussels Jazz Orchestra |
| BJP | The Boston Jolly Pirates |
| BJQ | Boneyard Jazz Quintet |
| BJU | Brooklyn Jazz Underground |
| BK | Ben Keen |
| BKB | Band Karo Bakwas |
| BKB | Boy Kill Boy |
| BKBB | Brass Knuckle Brass Band |
| BKBB | Brass Knuckle Brass Band Brass Knuckle Brass Band |
| BKG | Boy Kicks Girl |
| BKGN | Brantley Keith Gilbert Nation |
| BKO | Balkan Kafe Orchestra |
| BKO | Becca Kaufman Orchestra |
| BKUR | The definition of BKUR is simply Beats Kill us records, the owner of BKUR is Earl. Earl Founded BKUR |
| BLAM | Big Lesson About Music |
| BLDE | Boston Liturgical Dance Ensemble |
| BLDP | Black Light Dinner Party (band) |
| BLFB | Bridgeton Loyalists Flute Band |
| BLG | BMG Label Group |
| BLG | Boys Like Girls |