So, let's play "roles reversed" game. Or maybe not.
It is sad however, that you cannot even ask another human being for a cup of coffee.
I guess you could say you want the implication to be clear and fairly unambiguous, but not explicit/provable.
Double entendre comes to mind.
There is a big difference between "lets meet and talk to each other for an hour at the coffee shop on the weekend" and "We are at work, lets take a quick break!"
Though "Netflix and chill" is probably less ambiguous in most cases since it wasn't a commonly used phrase before it gained its implied meaning.