The band's choices of songs include instrumental numbers and songs with lyrics. The band members usually sing the songs together.
The band plays without having music sheets with them, so spontaneity and improvisation are welcomed during the sessions.
"The first time I came out, I was terrified, and my first solo was just awful. Just plain awful. But it's kind of freeing to be able to do what you want to do, and express yourself however you want," Higgins said.
"Everything we learn is by ear. We don't have any music written down. We just learn the notes, play it out. We rehearse every Friday night before we come out."
The music called Dixieland jazz was introduced to many of these band members when they were in high school, playing in school jazz bands.
Anne Stickley is a trombone player in the High Street Jazz Band.
"Jazz was always something I was interested in, I have played jazz for a while, but this is definitely the most comprehensive jazz experience I've gotten," she said.
"It has helped me so much as a player. I'm a sophomore, and my senior year of high school, I came up to take my audition. While I was waiting for my audition, they had student ensembles playing, and High Street Jazz was one of them. I thought that was so unique, it was something I hadn't seen at any other university," she said.
The band is now contributing to the genre, composing its own songs, including one called "High Street Parade."
The band usually plays from 10 to 11 or 11:30 p.m., depending on the size of the crowd and the weather.
There are 12 people in the High Street Jazz Band.
John Fitzmaurice says people come and go from the band, but the group just keeps playing.