Thank you for these questions, italki!
In Puerto Rico, it depends on the type of work setting and how young the people are, but we tend to be very friendly and offer coffee to one another frequently, especially in the morning. I can see a greeting going something like this:
Formally:
A: Buenos días, ya bebiste café?
(Good morning, have you had coffee yet?)
B: Buenos días! Fíjate no...
(Good morning! Actually, no...)
A: Voy a pedir café, quieres un café puya?
(I’m going to get a coffee, would you like it black?)
B: Dale, gracias!
(Sure, thank you!)
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Informally:
A: Buenas, cómo sigues?
(Hello, how are things?)
B: Todo bien, en la brega!
(All is well, just working!)
——————————————-
Or even more informally:
A: Muchacho, qué es la que?
(Dude, what’s up?)
B: Na’ pa’, to’ bien y tú?
(Not much, man. All is good, and you?)