This was right near Dupont Circle, famous as the main Gay neighborhood in DC.
Here is my theory:
These two similarly dressed white guys going into the hotel together are probably a gay couple, and one of them may have come onto the Black guy who points him out (or possibly even groped him). He may have mistaken the young Black guy for a homosexual prostitute, and crudely propositioned him.
The offended Black guy in turn may have gotten his friends and gone looking to beat him down.
Ah! that makes sense. The Dems and the MSM (redundant I know) will not know how to handle the intersectionality of this. Victim victimizing victim must be the result of white oppression.