It might be a more abstract story. The beer can could represent a certain lifestyle or attitude that attracts two people to each other. Like a carefree, laid - back lifestyle associated with enjoying a beer from a can, and through that shared affinity, a love story unfolds.
A third theme could be relaxation. Beer is often associated with unwinding after a long day. In 'beer a love story', it could be about how beer provides a moment of peace and relaxation in a busy life, and how that relaxation is a form of love for the drink itself.
I'm not sure. It depends on various factors and the source or context of the term 'Cocaine Beer'. Maybe it's just a fictional concept or could potentially have some basis in reality, but without more specific information, it's hard to say for sure.
I think 'beer a love story' might refer to a story where beer plays a central role in a relationship. It could be that two people bond over their shared love for beer. They might go on beer - tasting trips together, or they have a special beer that they always share on their anniversaries or special occasions.