First recorded (as a demo) by Dino Valenti (1964, released 1996).
First commercial release by The Kingston Trio (1964).
Also recorded by Jet Set (1964), Jefferson Airplane (1966), H.P. Lovecraft (1967).
Hit versions by We Five (US #31 1965), The Youngbloods (US #62 1967| US #5 1969), Dave Clark Five (UK #8 1970).
From the wiki: “‘Get Together’, also known as ‘Let’s Get Together’, was written in the early 1960s by American singer-songwriter and future Quicksilver Messenger Service lead singer Chet Powers (aka Dino Valenti). The song was originally recorded and released as ‘Let’s Get Together’ by The Kingston Trio in 1964 on their album Back in Town. In 1965, the first cover to break into the Top 40 was recorded by We Five as the follow-up to their Top 10 hit ‘You Were on My Mind’.
“The Youngbloods released their version of the song under the title ‘Get Together’. It became a minor Hot 100 hit for them, peaking at #62 in 1967. However, renewed interest in the Youngbloods’ version came about when it was used in a 1969 radio public service ad campaign by the National Conference of Christians and Jews. Re-released to radio in 1969, The Youngbloods’ version peaked at #5 on the Billboard Hot 100. A 1970 a UK-only-release cover by The Dave Clark Five, titled ‘Everybody Come Together’, went Top 10.