fun (n.) "diversion, amusement," 1727, earlier "a cheat, trick" (c.1700), from verb fun (1680s) "to cheat, hoax," of uncertain origin, probably a variant of M.E. fonnen "befool" (c.1400; see fond). Stigmatized by Johnson as "a low cant word." Older sense is preserved in phrase to make fun of (1737) and funny money "counterfeit bills" (1938, though this may be more for the sake of the rhyme).
Here, according to Google, is where you can have "fun" in Seattle:
If you're having trouble having fun, you might try the suggestions on this list of "how to have fun." Step four is: "Use a time-planning tool to plan activities for different days."