The Tennis Court at Millennium Hilton New York One UN Plaza

"Excellent amenities include the 27th-floor pool and health club with dazzling views, the only indoor tennis court in a New York hotel, and a convenient coffee bar serving Italian Illy products"

"There’s also a well-equipped 24-hour gym, an indoor tennis court, in-room spa treatments, a 24/7 business center, and free Wi-Fi"

"Amenities include an indoor pool, year-round tennis court and the highly regarded Ambassador Grill and Lounge"

" Tennis courts, an indoor swimming pool and a fitness center are located on the top floors"

"The hotel also has a full fitness center with top-notch equipment, an indoor tennis court and locker room facilities with saunas"

"Open, it offers the only indoor tennis court in a Manhattan hotel ($110 per hour of play from an independent company)"

"Aside from that, this hotel is good for staying fit on your visit as it offers a gym with glass walls that look out toward the river, a pool, an indoor tennis court and there is a public running path right outside the door"