Since Seattle doesn't have a Golf 'N Stuff (boooo), you've gotta settle for the next best thing, which is actually pretty great: Flatstick Pub. Boasting three Seattle area locations, these bars/epic mini golf destinations are the perfect low-key date spot, especially the stunning subterranean Pioneer Square location with its brick walls and intimate vaulted booths.
It may technically be called the South Lake Union Streetcar, but for most locals it'll always be a trolley, a distinction that gives this public transit line though one Seattle's busiest 'hoods its off-color nickname. Get on at Westlake, and hop off at whatever bars/restaurants along the way -- Suite 410, Re:public, Brave Horse Tavern, etc. -- catch your eye.
Learn to make cocktails from some of Seattle's best bartenders
Any number of Seattle's better boozers offer classes that can help you recreate the bar experience at home, including Currant Bistro in the brand new Sound Hotel, which just started a new cocktail-making series the 2nd Tuesday of every month that'll teach you everything from crafting warm, winter appropriate drinks, to making batched beverages for your next holiday party.