Black Tie Beach Day at Revere Beach 2013

BostonSOS hosted the Black Tie Beach 2013, where participants flash mobbed Revere Beach in their most elegant wear. They donned tuxes and cocktail dresses to build sand castles, play in the water, and meet other Bostonians this Sunday afternoon.

Classiness abounded as people wore tuxes and dresses to Revere Beach on Sunday.

Melina Mon walked along the shore in her fancy attire. “I think it’s fun,’’ Mon said. “It’s a nice way to meet new people who like to do new things.’’

Al Nadjarian of Boston beamed as he got ready to play in the sand.

Britta, 1, participated in Black Tie Beach. This was her first flash mob event.

Betsy Hernandez added shells to the sand castle. She heard about flash mob events from Improv Anywhere in New York, the group who started Black Tie Beach.

Stacy Nguyen played in the sand in her cocktail dress. “It’s nice to come out and not do anything too serious,’’ Nguyen said. “Most people in Boston aren’t from around here, so it’s a great way to find people to go to the beach with.’’

Jenny Bergman stood on the shore with her daughter Britta.

The Black Tie Beach event began in New York four years ago.

People ran into the water, their tuxes and dresses soon getting soaked.

The group made quite the sight as men stood in the water in suits.

Salem Ghoweri of Malden brought up buckets of water for sand castles.

Chris Charles of Somerville stood tall and proud in his beach suit.

Participants enjoyed swimming in their suits and dresses.

The tide moved in and out as this classy group walked through the waters.