The Latitude Adjustment Steel Band works in a variety of configurations based on the setting and/or budget considerations.
A duo may consist of pan (with sequencer) and percussion or pan and guitar or pan and keyboard . The choice of instruments would be determined by several factors. These might include the client's desire for vocals or how wild a crowd is expected (or desired).
A trio is generally lead pan (with sequencer),percussion and guitar or keyboard. Another trio configuration is pan, keyboard and drum set. This adds the spontaneity and extra energy of having a live drummer along with more dynamic flexibility (softer and more laid-back for the "reception" time, louder and livelier as the event evolves or devolves into all-out party time).
A quartet would add either a wind player or percussionist or a harmony pan player (if available).