Aaron Paul & Fiancée Mellow Out in San Francisco
11/07/2012 AT 06:00 AM EST
The couple arrived at the Redwood Room – the hotel's romantic bar – and spent about an hour relaxing, ordering up a cheese plate that featured a variety of gourmet cheeses.
"It was just the two of them, quietly playing cards. Maybe Gin Rummy," an onlooker tells PEOPLE. "They seemed relaxed and happy. They were having a mellow evening."
Even though Paul has starred in Breaking Bad for five seasons (and won two Emmys!), the casually dressed pair went "unnoticed by fellow guests," the source adds. "They were in laid-back San Francisco style."
– Dahvi Shira