2-4 players. Players use a common major scale – start with C major – but each is assigned a personal “spice” (i.e. dissonant) note as well. Players may use the spice tone at will, but remember that spices are powerful – a stew or other dish is usually best when spices are used judiciously.
Player 1: #4 (in C: F#)
Player 2: b6 (in C: Ab)
Player 3: b2 (in C: Db)
Player 4: #2 (in C: D#)
Variation: Restrict all players to the major pentatonic scale: 1 2 3 5 6 (in C: C D E G A) plus spice tone.
As usual: Repeat in all other keys.
And then: Repeat using other kinds of scales: dominant 7, minors, whole tone, diminished, etc.