How do you say please give me a coffee in Japanese?

Excuse me, could you please enlighten me on how one would politely request a cup of coffee in the Japanese language? I'm quite intrigued to learn the proper phrasing and etiquette involved in such a simple yet customary request. I understand that language nuances can greatly impact the reception of one's words, and I'm eager to grasp the essence of expressing this desire in a respectful and culturally appropriate manner.