Looking for circuit style drop-in workouts in NYC

Years ago, I did kickboxing at a place called 9 rounds. I loved that there were no specific class times - instead there were just 9 stations which continuously rotated all day long, so no matter what time you got there you could always jump in at one of the stations and complete all nine. I paid a monthly unlimited fee and could get a 40 minute workout at any time of the day without having to create my own - the workout was clearly written at each station .

What other types of gyms have this structure? and where can I find one in NYC (specifically east village if possible!)? open to kickboxing again or something new!!!!!