Since the characters in this poem are not directly stated, I would assume from the context clues that the characters are students in school. They are most likely older, in high school since it says "we thin gin."
I would also assume that the students are somewhat "rebels" since they left school and are getting into things they should not get into. They think they are being "cool" by doing this. I would also think this because it says "we lurk late" which means they are out all hours of the night. "we jazz June" means they probably like to party.
The students' attitude in this poem shows that they are also pretty careless. They don't seem to care about their actions and what will happen to them since it says "we die soon."