Contact an attorney right away and discuss it with him or her. You don't have to be near the liquor store to have the charge sustained by a court.
The information provided herein is for informational purposes and should not be construed to establish an attorney client relationship. To establish such a relationship, the prospective client would need to meet with me in person, and have a detailed discussion about all the facts and circumstances surrounding your case.
Contact a criminal defense attorney to assist. There are many good ones here on AVVO, just select "Find a Lawyer" at the top of the page. Good luck.
This is not intended as legal advice. No attorney / client relationship exists because of this response.
I presume your warrant is for Contributing to the Delinquency of a Minor, in which case that would be the first charge based upon what I have read here. As to whether there might could be any other charges and what they could be, that depends upon a number of factors. You should contact an attorney in your area to discuss your case.