"a small jump, a leap on one foot," c. 1500, from hop (v.). Slang sense of "informal dancing party" is from 1731 (defined by Johnson as "a place where meaner people dance"). Meaning "short flight on an aircraft" is from 1909. Hop, skip, and jump (n.) is recorded from 1760 (hop, step, and jump from 1719).
This word [hop] has always been used here as in England as a familiar term for dance; but of late years it has been employed among us in a technical sense, to denote a dance where there is less display and ceremony than at regular balls. [Bartlett, "Dictionary of Americanisms," 1848]