Hotel Nikko San Francisco is a stylish hotel located in the Union Square neighborhood. The hotel offers soundproof rooms that provide a quiet and comfortable environment for guests. The rooms are tastefully decorated and feature modern amenities such as flat-screen TVs and minibars. Guests can also enjoy the hotel's rooftop terrace, fitness center, and on-site restaurant. With its convenient location and soundproof rooms, Hotel Nikko San Francisco is a popular choice for travelers looking for a peaceful stay in the city.