[1] The term originated during the swing era of dancing, probably borrowed or appeared in parallel with the expression "jam session" in music.
In Lindy hop, it is common for jam circles to take place on or around special occasions such as birthdays or weddings.
It is a way to show one's experience, the flavor they put into their style, and in some cases, specifically to "burn" or "smoke" another breaker.
For example, this kind of jam circle may be organized when a dancer from the local dance community celebrates a birthday, or is moving away.
Such birthday jams are common in swing dance and hustle communities in the United States but not unusual in salsa or tango.
This form of jamming often occurs during prom, high school or college dance parties.