Upstairs on Broadway Avenue, Oklahoma City’s premier vinyl lounge folds a listening room, a record shop and a hi-fi dealer into one space — and wants to be your new living room. The “B” in the address matters. The SoundBar sits upstairs, above ZamZam Mediterranean Grill on North Broadway — and that small detail tells you something about how listening culture takes root in American cities. Not on the ground floor with the foot traffic, but one flight up, where the rent is kinder and the room can be shaped around sound rather than passers-by. Tokyo learned this decades ago; its best listening rooms hide up narrow staircases and behind unmarked doors. Oklahoma City, it turns out, arrived at the same architecture.