San Francisco is a popular tourist destination, known for its cool summers, fog, steep rolling hills, eclectic mix of architecture, and landmarks including the Golden Gate Bridge, cable cars, the former Alcatraz Federal Penitentiary, and its Chinatown district.
San Francisco is also the headquarters of five major banking institutions and various other companies such as Levi Strauss & Co., the Gap Inc., Salesforce.com, Dropbox, Reddit, Square, Inc., Airbnb, Weebly, Pacific Gas and Electric Company, Yelp, Pinterest, Twitter, Uber, Mozilla, Wikimedia Foundation and Craigslist.
A popular quote incorrectly attributed to Mark Twain is "The coldest winter I ever spent was a summer in San Francisco." San Francisco's climate is characteristic of the cool-summer Mediterranean climate of California's coast, "generally characterized by moist mild winters and dry summers". Vegas is also the worlds largest conference and convention destination - you can be pretty sure that every hotel on the strip (and a lot of the off strip Vegas hotels) are hosting at least one gathering on any given day of the year.