The Emerald City has many line dance opportunities
They are located at senior centers, parks, community centers, private studios and bars.
Check out the whole list. I hope something fits your needs.
Seattle city proper is as full of classes as anywhere in the Greater Seattle Line Dance area.
CITY OF SEATTLE
SEATTLE PARKS AND RECREATION (SPARC)
SPARC has line dance classes at many of its centers. Place, date, and time can change monthly to quarterly. The listings below could be out of date, but most are offered year round at the same day/time. For most recent changes: please check their website: https://class.seattle.gov/parks Search under Programs - Category - Performing Arts