A jam session, also known as a jam, is a musical event where musicians come together to improvise and play music without any pre-planned material. There are many synonyms for jam session, including 'open mic', 'jamming', 'freestyle session', 'jamming out', 'sessioning', 'jamming together', 'playing together' and 'unplugged performance'. These terms highlight the spontaneous nature of the event and the social aspect of musicians coming together to create music. Jam sessions can occur in various settings, from small gatherings in private homes to public venues, and they can involve a range of musicians from different genres and backgrounds. The common denominator is the shared love of music and the desire to have fun playing together.