Warwick Regis Hotel is located in San Francisco near: Featuring some of the most elegant Union Square accommodation facilities, the Warwick San Francisco Hotel offers 74 rooms including 16 suites that are tastefully appointed in the style of Louis XVI. In 2002, the hotel underwent an extensive renovation. The renovation ensured that Warwick San Francisco Hotel's European elegance and comfort were retained whilst introducing new colour schemes that complement the authentic Louis XVI antique armoires, four-poster and crown-canopied beds and hand-carved headboards.