If a radio station near you said they featured “music for the ‘burbs,” what do you think they would play?

I do not know of a genre of music that would exclusively identify with the suburbs. As Americans moved to the suburbs in large numbers in the twentieth century for numerous reasons, music changed in the United States as well. This included new genres, new methods for playing and hearing music, and new audiences. And all of this happened on a mass scale; music could be produced, played, and listened to for and by millions of people.
Turning back to this particular station, would it be a surprise that they are a hot adult contemporary station? Here is how Wikipedia describes this subset of adult contemporary:
Hot adult contemporary (hot AC) radio stations play a wide range of popular music that appeals towards the 18–54 age group;[43] it serves as a middle ground between the youth-oriented contemporary hit radio (CHR) format, and adult contemporary formats (such as “mainstream” and soft AC) that are typically targeted towards a more mature demographic. They generally feature uptempo hit music from the last 25 years with wide appeal, such as pop and pop rock songs, while excluding more youth-oriented music such as hip-hop.[42][41] Older music featured on hot AC stations usually reflects familiar and youthful music that adults had grown up with.[44][41] Likewise, material from legacy pop acts such as the Backstreet Boys, Jason Mraz, John Mayer, and Pink is prominent within the format.[41][40]f
Pop music of the last few decades for 18 to 54 year olds is suburban music? Maybe more so than some other formats.
(The other part of this station’s tag line is that they broadcast from the ‘burbs. This contrasts with the majority of the radio stations in the area that identify with the big city.)

