The Centurion lounge at SEA had what they called a Capitol Hill. Woodinville Rye whiskey from outside Redmond mixed with an amaro, Cointreau, and white vermouth. Cool little wrinkle on a Manhattan; I'd usually try to grab one on the way down to DWE.If y’all want a new direction to go, suggest picking up a bottle of Amaro and Campari or Aperol (or Peychaud’s makes a good aperitivo now too). Look up a Paper Plane- great cocktail, especially for those who have liked manhattans and/or Negronis (gin shoutout!). Opens up a whole new world of messing around with amaros (huge spectrum, from pretty tame to the other end, which can be like eating a physical pine tree), aperitivos, and the like. More depth and breadth to explore in my opinion than bitters.
When in-person DWEs were still a thing, that is . . .