often leader(s) do not appear to be leaders at all. Occasionally, even the leaders of a session may not realize that they lead. Practically, however, there are always leaders at a session, by the nature of human dynamics. Some sessions follow a round-robin structure, others have a more free-for-all approach, and the leader(s) of a session should be observed to see how this particular session is run. Due to freeform nature of the session, there is always an element of serendipity and there is an atmosphere of anticipation and an expectation of tolerance from all present. It is frowned upon when one openly criticises people who know only one song or only a few tunes. Sessions are occasions to be enjoyed by all participants, and if others are accepted members of the group, it is not up to one person (other than the leaders of the session) to decide that they are not welcome. Legal considerations In England and Wales the Licensing Act 2003 came into force in 2005. It could be interpreted as meaning that any performer would be obliged to give prior notification to police, fire brigade and environmental health. Following much lobbying by various groups, the law settled down to allow "spontaneous" events and religious events. See also Folk clubs Irish traditional music session List of public house topics References External links thesession.org – Information about sessions worldwide. UKSessions.net – Music session in the UK. The Tradition of the Pub Session Music events Drinking culture Irish culture British culture Manx culture Folk music venues Pubs