Thousands of revelers in New York, Chicago and San Francisco celebrated their gay communities on Sunday.

The party was held on Market Street in San Francisco as a spirited crowd cheered on more than 200 floats.

Mayor Ed Lee walked the parade route nearly a week after he kicked off the city's celebration with a rainbow flag raising ceremony on Monday at City Hall.

At the ceremony, Lee promised continued support for local HIV/AIDS services.

He also addressed the crowd at the city's Gay Pride festival at the Civic Center soon after the parade's end.

Former Mayor Gavin Newsom was spotted at the parade with his daughter.

In Chicago, a new route on the city's North Side attracted large crowds.

It was the second Gay Pride after Illinois lawmakers approved civil unions for gay and lesbian couples and many revelers said it was time for marriage equality to come to the state.

Last week, a Cook County judge agreed to consolidate two lawsuits challenging the state's ban on gay marriage. Illinois officials, including Cook County state's attorney and the Illinois attorney general, have refused to defend the law, saying they agree the ban is unconstitutional. The conservative Thomas More Society has said it would intervene to defend the law. According to the Chicago Tribune, however, the organization has yet to petition the court.

New York City's Fifth Avenue parade was helmed by grand marshals Cyndi Lauper, Chris Salgardo, president of cosmetics brand Kiehl's, and Phyllis Siegel and Connie Kopelov, the first gay couple to marry in New York City.

Parade organizers said they hoped their “Share the Love” theme would encourage the spread of marriage equality to states that currently ban such unions.

“New York is a place where you can do whatever you want to do,” Mayor Michael Bloomberg said before joining the parade. “The government should get out of your personal life.”

Also participating were Governor Andrew Cuomo, who signed the state's gay marriage bill into law, and City Council Speaker Christine Quinn, who married her partner last month.

“A year ago, I was walking with my fiancee,” Quinn said. “Today, I'm marching with my wife, my father and the mayor.”