Not really a campfire but we have a fire pit at the back of the house and quite often we have what I would call musical drinking sessions.
Usually, two guitars, maybe acoustic bass, djembe drum, two cabassas, a tambourine and a whole bunch of lyrics. Sessions like this often fail because most folks know about the first two lines of a song and maybe the chorus. This don't work too well I've found.
Favourites are Akon - Nobody Wants To See Us Together, Bob Marley - Stir It Up. U2 - With or Without You, Bobby Mc Ferrin - Don't Worry, Be Happy and usually as the night goes on, - anything by Elvis. Oh, and the last one we had, my daughter visiting from England did a really bad version of Sweet Caroline as a reggae song, (I know, that's hard to imagine, ha, ha.).
I know, these are not musical get togethers but what I would call drunken fun times with a little home grown music thrown in.
Gordon.
Oh and Black Magic Woman.... is a popular choice...
At least it beats pressing plastic buttons on a plastic guitar and pretending to be a rock star in front of a tv screen.