Kelly Middleton and her partner Amanda Dollente got in line at 4 p.m. Wednesday.
Hours later, as the line grew, volunteers distributed roses and a group of men and women serenaded the waiting line to the tune of "Going to the Chapel."
Because the state has a three-day waiting period, the earliest that weddings can take place is Sunday.
In dealing with marijuana, the Seattle Police Department told its 1,300 officers on Wednesday, just before legalization took hold, that until further notice they shall not issue citations for public marijuana use.
Officers will be advising people not to smoke in public, police spokesman Jonah Spangenthal-Lee wrote on the SPD Blotter. "The police department believes that, under state law, you may responsibly get baked, order some pizzas and enjoy a 'Lord of the Rings' marathon in the privacy of your own home, if you want to."
He offered a catchy new directive referring to the film "The Big Lebowski," popular with many marijuana fans: "The Dude abides, and says 'take it inside!'"
"This is a big day because all our lives we've been living under the iron curtain of prohibition," said Hempfest director Vivian McPeak. "The whole world sees that prohibition just took a body blow."
Washington's new law decriminalizes possession of up to an ounce for those over 21, but for now selling marijuana remains illegal. I-502 gives the state a year to come up with a system of state-licensed growers, processors and retail stores, with the marijuana taxed 25 percent at each stage. Analysts have estimated that a legal pot market could bring Washington hundreds of millions of dollars a year in new tax revenue for schools, health care and basic government functions.
But marijuana remains illegal under federal law. That means federal agents can still arrest people for it, and it's banned from federal properties, including military bases and national parks.