I didn't call for a coffee, someone called me out for one out of the blue; with that person I was pretty clear on what I wanted when we first met for instances, and then got nothing but silence for a whole week.
I don't see how specifying "but it's a date, date!" is helpful when you ask them out for dinner, and they take you up on the offer, even if you say hang out.
People don't pick up on hints a lot, even if you think you're being obvious. Why even leave that up to interpretation?
Also like Diaboli said, I asked friends out to things like dinner and coffee fairly often. dinner =/= date.
Hang out generally means something friendly to most people, not "oh it's a surprise date"