We used to live in the Greenlake area and love it! There's a walking trail around the lake that's 2.8 miles, along with the option to rent kayaks, peddle boats, etc. to use on the lake. There are also lots of great bars and restaurants in the Greenlake neighborhood!
This is a fun and scenic rooftop bar in South Lake Union, a neighborhood in Seattle. Go for dinner and drinks, or just grab a drink and enjoy the view! I know they were taking reservations because of covid restrictions - feel free to check that out ahead of time.
A must-visit at some point! Super popular for Seattleites and visitors alike. Will warn you that if you don't do well with heights, you may want to skip this one. They added glass floors to the observation deck - my hands are sweating just typing this :)