It's not exactly a "driveway". Things like the U-shaped road-thing in front of a hotel don't really have a good name.
You sometimes say a "drive" (a "drive" is basically "a bigger driveway" - !)
This is certainly not a "patio". One possible word to use is "forecourt".
(Note however that, contradictingly, in a petrol/gas station, the forecourt is indeed the general area that cars rest on where the fuel pumps are.)
Or possibly (but unlikely) "entrance".
If you were in the office, in practice you'd say "meet you out front" to refer to exactly that area. So in a sense it's called the "out front".
Note that indeed it's basically the sidewalk but my impression is the whole thing (even the road) is more of a private structure, "part of the building" not just a sidewalk that goes on and on
You could call this the "entrance".
You could possibly call it a patio, but they tend to be more on houses.
An architect might call it the "arcade" or similar.
You could possibly say meet me "under the arches" (even though not literally arced).
As in another excellent answer, you could call this "on the steps", "meet me on the steps". (Even though not literally the steps that lead up to, uh, on the steps.)
Be aware that often in English there is no good, specific word for things like this.
As I mention for example, simply the "entrance driveway thing" in a large hotel, really has no clear name. It is "bigger than a driveway" but "smaller than a drive" - there's no real name!