Sites and sounds: Visit iconic music venues throughout the country

The Continental Club on South Congress Avenue is a dim, snug, loud room that barely holds 200 people, a pool table and a stage.

In the middle of a show at Cain’s Ballroom — when the maple floorboards are trembling, the neon star in the ceiling is gleaming and a high guitar note is bending toward bliss — you might suspect that the room was never intended for this.