Jess Goldberg and Carolyn Shaughnessy, both in their early 20s, were out for drinks at Le Manoir in Pointe-Claire last Friday.
Goldberg says they were approached by the manager and told to stop after they shared a kiss.
But Goldberg says that about two hours later, when they kissed again, they were asked to leave.
"I think I had my hand on her leg and she kissed me, and he came over even more frantic than the first time," she said.
Goldberg reacted by posting a complaint on Le Manoir’s Facebook page and on her own.
“This type of discrimination is repulsive … They kicked us out for being gay,” she wrote.
The bar’s page was soon flooded with support for the couple and calls for a boycott.
Goldberg says this would have never happened to a heterosexual couple.
"This has never ever happened to me in my life. I've been to bars downtown, in different cities and different countries and I've never been treated like this."
Le Manoir has since posted an apology on its website.
Bar owner Peter Sergakis told CBC on Monday that his manager overreacted.
"If they were kissing as normal, two people kissing one another, it's unacceptable to tell them to leave," he said.
Sergakis also owns the Sky complex — one of North America’s largest gay bars — located in Montreal’s Gay Village.
Sergakis says that the way his manager behaved does not reflect his values, and his bars are open to all members of the LGBT community.