Tarlach MacNiallais, a prominent gay activist was tackled and beaten by bouncers at a Queens nightclub because he was dancing with a man, cops said yesterday. MacNiallais, 47, was punched and kicked and had a chair smashed over his head in the attack by two security guards at the Guadalajara De Noche restaurant in Jackson Heights at 12:43 a.m. Saturday, police said.

The attack is being treated as a possible hate crime. "[The bouncer] said, 'You can't do that here, this is not a gay bar,' " MacNiallais told cops. "I said I have just as much right as anyone else." MacNiallais -- spokesman for the Irish Lesbian and Gay Organization, which is best known for its annual fight to march in the St. Patrick's Day Parade -- said the bouncers wrestled him to the ground and dragged him away from other dancers before they attacked him.