Background Checks New York

Hi, I just received a pink summon for open container alcohol 10-125(2b) and a ticket of unsafe riding on the subway. I am under the legal drinking age and i am worried about how this will effect me?in general, background checks(job applications), citizenship(currently a permanent resident) and such?

This how it happened.
Last night, around 10 o’clock. My roommate and I decided to go and see a movie. we made a drink with 1 shot of vodka and ice tea.
we got on the train and we decided to move up to the next chart, but we didn’t want to leave the train ’cause we were afraid that if we leave the train, we might miss it. this is the detail of the violation for transit adjudication bureau “At T/P/o, p,o observed respondent walking from one train car to the next through open end door causing unsafe conditions”
so we sat down in the next cart, and these two police officers flashed their badge and asked us to get off on the next stop in which we did.
they gave me a pink open container alcohol summon and the traffic adjudication bureau, and gave my room mate a pink open container alcohol because he had his pda card even though it was expired.

should i plead guilty or not guilty? even if do plead guilty by mail, should i show up for the hearing? is there anyway to prevent this from showing up on my records? such as making it up with community service?
i don’t know what to do now. so the next time i fill out an application for jobs or asked “have you ever been convicted of a crime or felony?” or such . . . . . what should i answer?

any suggestion would be greatly appreciated.