Flash Mob Takes Over Blue Back Square

The courtyard area in Blue Back Square was packed Wednesday with people enjoying the free concert by the Martha's Vineyard band "Entrain" on a beautiful summer evening. The concert was celebrating the conclusion of Playhouse on Park’s "Pennies for the Playhouse" fundraising campaign.

A sneek peek performance by the Playhouse on Park's cast of "Chicago" was scheduled to take place between the band's sets.

As Entrain began their final song, "Chicago" cast members began to dance, and they were quickly joined by approximatley 100 other people. The square quickly erupted into a smoothly-choreographed Flashmob accompanied by the music of Entrain.