A Broadway pack would be a great addition to the Sims, to be able to perform on stage to a live audience.
However, it's possible Music Bands and Stage Acts could be separated into two expansions due to complexity, however each would share the need to perform in front of an audience.
Stage Acts:
- Magician
- Musical
- Professional Dance
- Stage Play
Bands: instruments
- Classical ensemble: harp, cello, flute
- Jazz band: upright bass, saxophone, trumpet
- Rock band: base, electric guitar, drums
- Marching band: tuba, trombone, snare drum
- Big band: clarinet
Instead of a Fame system [Get Famous], maybe a Stardom system where you increase your Star Power to unlock perks; with end goals such as becoming a Rock Star, Stage Star, and cross-pack with [GF] Movie Star.
Include the ability to perform as a duet, trio or quartet.