The Mosser - San Francisco, CA

Stay at The Mosser in San Francisco

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Historic Hotel next to Union Square

The Mosser has been a staple near San Francisco’s Union Square since it first opened in 1913 as the Keystone Hotel. Located halfway between Market Street and Mission Street, the modern hotel sits across from the Moscone Center and around the corner from the best boutiques as well as the upscale Westfield San Francisco Centre mall in Union Square. Head east on 4th Street, and you’ll quickly encounter the Yerba Buena Gardens, a two-block park home to memorials, museums, and an ice-skating rink.

California cuisine—a style that typically includes seasonal, locally sourced ingredients—is the focal point of Annabelle’s Bar and Bistro. The onsite bistro has a wide-ranging menu that employs locally sourced ingredients in its artisan pizzas and fresh seafood dishes. Try their pan-seared Pacific snapper, served with roasted crimini mushrooms and a walnut cream sauce, or the sweet dumpling-squash ravioli paired with sage-browned butter sauce. Pop by during the daily happy hour for discounted food and drinks from 3 p.m. to 6 p.m.

Elegant deluxe queen and deluxe full rooms feature wooden venetian blinds and newly implemented granite and steel fixtures in the private bathrooms.

San Francisco: The Moscone Center, Little Italy, and More

Just a five-minute walk from the hotel, you’ll discover the Yerba Buena Gardens, which feature a Martin Luther King Jr. memorial that sits behind a 50-foot-high waterfall. The public gardens (including a butterfly garden) cover two city blocks. They’re attached on the southeast side by pedestrian bridge to the Moscone Center.

Jump on the Powell Street cable car and head up into North Beach for a taste of San Fran’s Little Italy. North Beach has held to its Italian heritage since fishers from Genoa immigrated to the area more than a century ago. Sandwiched between Chinatown and Fisherman’s Wharf, North Beach centers around Washington Square park, which abuts the Saints Peter and Paul Church. To find the epicenter of the neighborhood’s noticeable beatnik influence, walk about three blocks south to City Lights Bookstore. The independent bookstore and publisher has remained a symbol of San Francisco's literary scene and progressive politics since the 1950s, when it was a hangout of Allen Ginsberg and Jack Kerouac.

No-shows will be charged total Groupon rate; no refunds, rescheduling, or rebooking allowed. Read the Fine Print for important info on travel dates and other restrictions.


  • Annabelle’s Bar and Bistro
  • Walking distance to Union Square and Moscone Center
  • Complimentary coffee, tea, and muffins served from 7 a.m. to 10 a.m.
  • Free WiFi

The Fine Print

  • Dates cannot be changed once booked
  • Valid only for night(s) purchased
  • 3-day cancellation notice required prior to check-in or reservation is non-refundable
  • No-shows will be charged total Groupon rate
  • Traveler name must match ID at time of check-in
  • No refunds will be processed by Groupon after check-in
  • Must be 21 or older to check in
  • 15.5% tax not included.

Other Details

Room Details

Deluxe Full Room

  • One full bed
  • Standard occupancy: 2
  • Maximum occupancy: 2
  • Cable TV

Deluxe Queen Room

  • One queen bed
  • Standard occupancy: 2
  • Maximum occupancy: 3
  • Adding occupants above standard: $15 per night for an additional guest
  • Cable TV

Hotel Policies

  • Check in: 3 p.m.
  • Check out: noon
  • Parking: valet parking is $35 plus tax for standardized vehicles and $45 plus tax for oversize vehicles.
  • Rollaways: available for an additional $15 per night
  • Smoking policy: no smoking inside the property
  • Pet policy: pets are not allowed inside the property.
  • Accessibility: call the hotel with accessibility requests.
  • Room upgrades: not available

Getting There

  • By plane: 14 miles from San Francisco International Airport (SFO)
  • By transit: BART rail toward Pittsburg/Bay Point, Powell St. stop
  • By cab: about $60 from SFO
  • By shuttle: $14 one-way from SFO
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