It’s summertime. Let’s listen to live music outside. THE CITY PARK JAZZ series is one of Denver’s best free Sunday traditions. There’s still a lot of celebrating to take in when beloved Colorado singer Hazel Miller and the Collective take to the park’s Pavilion stage June 30 at 6 p.m. In July, enjoy the vibrations of JoFoKe & Same Cloth on the 7th, Delta Sonics Blues Revue July 14, the powerful Denver Jazz Orchestra on July 21, and saxophonist Nelson Rangell July 28.