All events are in Brooklyn unless noted and most are free. Friday, Aug. 19: Battle of Brooklyn Neighborhood Walk. Commemorate the 240th anniversary of the Revolutionary War’s largest battle by learning about the important locations it was fought in. Led by Old Stone House Board Member and Hunter College Archaeology Professor William J. Parry. Meet at the NW Park entrance, Friday, 6 pm, Saturday, 4 pm, Grand Army Plaza • Union Street between Flatbush Avenue and Prospect Park West. Friday Night Fireworks, 9:30 pm until Saturday, Aug. 27, Luna Park, West 10th St. and the Boardwalk, Coney Island. Dreamland Roller Disco, roller diva Lola Star hosts a weekly skating dance party for grown-ups, Fridays, 7:30-10 pm until Oct. 14, $6, LeFrak Center at Lakeside, 171 East Dr. at Ocean Avenue. Steeplechase Friday Night Acoustic Music for a weekly performance from a different artist, Steeplechase Beer Garden, 1904 Surf Ave. at W. 17th Street, 5 pm until Sept. 9.