Most of your photos were taken prior to 1920 at Heney and McCotters Ocean Tide Baths, located at West 35th Street and Surf Avenue at the West End of Coney Island. Ocean Tide had a private boardwalk and was one of the bathhouse bungalow colonies that sprang up along the beach in the late 1890s. Next door was Jefferson Baths, Sea Gate Villa, and Carlton Court. Some of these businesses operated into the 1970s. They were summer bungalows, rented for the season, but also had lockers for beach-goers that could be rented on a daily basis.
The area around 35th Street was heavily Irish and had a number of great bars and restaurants. I'll post more info later. I'm including a 1918 photo of Ocean Tide.
Hope this helps.