Music has a unique way of setting the mood. A song can dictate the atmosphere or vibe of a specific setting, or it can fuel certain conversations. Jazz can be fitting for the serene feeling that comes with the autumn season. This is the creative nexus for the show “City Lights & Blue Lights,” which is being put on by the Symphony New Hampshire Jazz Quartet at The Rex Theatre in Manchester on November 6. The show starts at 7:30 p.m and it features a diverse set of music that’s both rhythmic and soulful.