Wiktionary
love-in
n. a social gathering to promote love and feelings of well-being
Wikipedia
Love-In
Love-In is a live album by jazz saxophonist Charles Lloyd recorded at the Fillmore Auditorium in San Francisco by the Charles Lloyd Quartet featuring Keith Jarrett, Ron McClure and Jack DeJohnette. Selections from the same concert were also released as Journey Within.
Usage examples of "love-in".
This was the era of love-ins, psychedelics, dropouts, war protests, body paint, assassinations, LSD, and rumors of kids so stoned their eyeballs got fried because they stared at the sun too long.