The man denied the charge, claiming that he touched her by mistake.
The complainant, a 25-year-old waitress, told the prosecution that she did not know the suspect prior to the incident.
"It was at 1.20 a.m. on August 3. I was near a restaurant and was about to go to a supermarket. My friend was with me. There were five to six men coming in the opposite way. One of them groped me intentionally. I yelled at him but he then replied in a very abusive and vulgar manner."
He did not just ignore her screams for help but also laughed and continued on his way.
A ruling will be pronounced on October 11.