The madrigal I've been adapting for the maypole lyrics is itself a lovely, fun song. The English is more than modern enough to require no translation; the melody is fun and amusing all by itself. It's popular enough that if you start the melody in the right company, you may have a spontaneous four-part madrigal by the time you're done.
ChoralWiki has nine different versions available, in a wide variety of file formats (both sheet music and audio files) for free.
If you're a "learn by ear" sort, here's a nice YouTube video of a four-member, apparently French group performing it:
Movement on stage: Standing stiffly like a rock is no good, but neither is aimless wandering.
The Taipei Chamber Singers's guest conductor is clearly enjoying the heck out of this. They're singing the "on the greeny grass" (instead of "a-dancing on the grass") variant, and really working the dynamics of the song. I don't know if Morley indicated that the verses should be sung alternating forte and piano, but it's a nice effect.
Solo performance with instruments by a Spanish (? at least, the band's name is Spanish) group, also "greeny grass." [Edit: No, not Spanish; Portugese or Brazilian, I think.]