See me once, with two joints, already half high
See me twice, as a part of the toast that the people will cry
See me once, at concerts, but not Bob Marley's
See me twice, aren't these some cheerful parties?
Hints will be added after 1 day, if needed. Have fun!
If you are not familiar with my See me once riddles, I recommend you first have a look at the latest riddles in this series:
#7, #8, #9, #10