If you're a musician or performer, be sure to come and create your music on Mondays in an informal atmosphere - improvised solos, tunes or songs with no set arrangements. If you're a listener, come to enjoy the free jazz improvisations every Monday.
Jam Session is an informal music event where musicians, usually instrumentalists, play improvised solos on tunes, songs and chord progressions.
Jams are usually referred to as improvised music without much preparation or pre-arranged arrangements, except when participants play well-known jazz standards.