A bard can cause other bards to sing with them by using the CHORUS command followed by their verses. Separate each verse line by a semicolon. For example:
CHORUS And the highwayman came riding;Up to the old inn door...
This only works if another player is singing chorus with you. To do this, they must type SING WITH [Bard's name]. To stop, they can either SING WITH [Bard's name] STOP or CHORUS STOP. Both chorus leader and chorus singer must be sufficiently skilled to sing chorus.