A Washington union set up a picket line last night outside the building where a reelection campaign party for D.C. council member Betty Ann Kane (D-At Large) was being held.

"This is an informational picket line," said Ron Richardson, executive secretary of the Hotel and Restaurant Employees Union Local 25, as about 10 people walked in front of the Wax Museum nightclub at Fourth and E streets SW.

Kane, who arrived minutes after the picket line was established to join the party crowd of about 125 people, said the union had given her no warning of the action.

Richardson said his group established the picket line as part of a continuing campaign against such nonunion establishments as the Wax Museum. He acknowledged that the union picketed the club because of Kane's party and said he had not warned Kane of the action. Kane told a reporter that she would not knowingly have scheduled an event "if a union had a problem with a place."

Earlier this summer a political forum including Mayor Marion Barry and other mayoral candidates was held at the club without incident. Richardson said his group would have set up a picket line at that event had it been aware that it was scheduled.