This is a berry bush outside my workplace. What species is it? I can easily get more pictures if that would be helpful.
Assuming that this had white flowers on it a few weeks ago, and assuming that you're in North America, I'd say that the shrub is a Chokeberry (Aronia melanocarpa). The shrub might be about 3 feet high and wide, unless trimmed by your workplace's maintenance people. If I'm right, then the berries are edible, but only if cooked first (too bitter otherwise - hence "choke" berry). They apparently make very good juice.