"It's great, you can't not watch it's addictive," said Jen Furman from San Francisco.
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Guests paid $125 to show off their fascinator hats, drink tea and eat English crumpets. There were even a few American treats for Meghan.
"We have donuts because everyone loves them," said Chris Dean from Crown and Crumpet Tea Cafe.
"I'm watching it for the second time. I got up at 3 AM to see the wedding and pageantry live," said Carrie Tsai from San Mateo.
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On Nob Hill, The bells at Grace Cathedral chimed a short fanfare concert at noon in honor of the Royal couple. The Episcopal church has close, historic ties to the UK.
"What an honor to to them, a signal we recognize what's going on in England, it's awesome," said tourist Robin Johnson.
For more on the Royal Wedding of Prince Harry and Meghan Markle, click here.