Help ID this Shrub with Black Berries

I thought at first these were chokeberries but the berries are in a hanging form like grapes and not clustered in an sort of umbrella form.

 

Looks like Chokecherry to me. Glossy Buckthorn looks similar, but its berries hang individually from a stem, whereas Chokecherry fruit hangs as a group from a longer stem.

 

Ditto to Chokecherry, the western black-fruited variety Prunus virginiana var. melanocarpa.

 

Thank you both, I believe your right.
Much appreciated!