" this is my point, people need to know what the event is, and to use the word that has been used for years to mean an *instrumental get together in a Pub without qualification is not helping things.
Having attended "music sessions" since the late 50's and my Father ran "session" way back from the 20's (various styles of music) - in all that time a session has meant what has been said previously by me (and others) simply a get together.
Now I agree with you PP that if and event is advertised it should include any provisos put on it by the organiser/s e.g. Instrumentals only, No Singers allowed, No more than one Bodhran at any one time to be played, No eggs, etc. etc. ad nausea......
To me the word "session" being incorrectly used in the context of a Musical Instrument playing only session, came about with the influx of Irish Music Pubs and the crossing over of many local bands from Folk to Irish and the "in" use of the term "craic" - of course this was like the influx of American music and protest songs in the sixties along with pseudo American accents being adopted....
As for not being allowed to use a word in its original form because "others" have deemed it to be meaning something else well slang is slang! and I'm still happy to be Gay and heterosexual!
Use the English Language to describe your event properly or don't be so bigoted and insular
* I can't find this definition even in my slang dictionary..... please refer me to your source