Jackson & Campbell’s Robert Rider Jr. concedes that he tapped another firm lawyer on the backside at a party, according to court papers.

But in a civil suit against Rider, 44, Elisa Eisenberg describes the incident as career-ending assault and battery. Eisenberg, 42, a former nonequity partner at the 50-lawyer firm based in Washington, D.C., is suing Rider (also a nonequity partner), Jackson & Campbell, firm president Richard Bryan and former president James Schaller.