Six men were attacked and slightly injured in Berlin-Neukölln.
An uninvolved 19-year-old also got irritant gas like the attacked, as the police announced on Friday.
A partially masked group attacked the 18 to 32-year-old men in a snack bar on Karl-Marx-Straße on Thursday evening with kicks, blows and pepper spray and then fled.
Berlin - The attacked as well as the uninvolved woman suffered eye irritation according to the information.
The youngest complained of pain in the face, the oldest was injured in the hand.
It is unclear how many attackers there were and why they attacked the men.
Since no suspects could be named, investigations will take place in all directions, said a police spokesman.
dpa