Residents had high hopes when La Marina opened, given its sublime perch on the Hudson and its enticing beach-resort architecture. The restaurant replaced a junk-filled marina that closed after the operator was charged with selling drugs, and that also drew complaints about noise and traffic. In response to the current criticism, one of the owners, Jerald Tenenbaum, said in a statement: “La Marina is no longer a drug den or a magnet for all varieties of crime, which it undeniably was eight years ago. It has brought a large degree of pride to the neighborhood.”

Angry residents have circulated a polished online presentation, put together anonymously, that lays bare the alleged violations of La Marina’s license agreement with the parks department, with photographs, Instagram messages and D.J. promotions as evidence. One D.J.’s tweet boasted of drawing 3,600 people to La Marina, while another’s claimed 6,000. The official capacity, according to the parks department, is 1,500.

In some cases, the complaints are out of date. The presentation notes that La Marina is supposed to be open only seasonally, but the parks department has amended its license, allowing it to operate year-round. Similarly, it can now stay open until 1 a.m. seven days a week; originally it was to close at 12:30 a.m. Thursdays through Saturdays and at 11 p.m. Sundays through Wednesdays. As for music, the city originally said that La Marina could amplify music only with prior approval, and never past 10 p.m. It has since softened that restriction, allowing amplification without special permission, but still only until 10.

On Saturday, however, the two D.J.s, one supplemented by two live drummers, played until 1 a.m., the music emanating from a series of high-powered speakers on elevated poles. Neighborhood residents said it was a common practice.