Lester, I understand your view, and I respect it, and I think there propbably is room in the world for what I guess we can call fusion sessions for lack of a better term.
That being said, I think you underestimate the importance of sessions for carrying on various traditional music forms (well at least Irish Music, but I suspect much the same coudl be said of other forms, even if their sessions take place in the homes of the music lovers as opposed to a pub). As a person who has only been playing the box for a year (and making pretty decent progress on it if I do say so myself) I find that the sessions I attend, both to listen and to play has had a major impact in helping me improve. While I listen to lots of different styles of music, it would be impossible to learn let alone master more than two or three forms in the amount of time I have to dedicate to music. I don't want to be a casual browser of Irish Traditional music who knows how to play 20-30 tunes (my current range) and then move on to say 20-30 bluegrass tunes on a banjo and then another 20-30 tunes in yet another genre... Further, even in such a narrow category as irish traditional music, there is such a variety of styles and tunes as I think it will keep me happy exploring it for many years. My accordion teacher knows upwards of 3000 tunes, I would like to think that 500 or so would be a reasonable goal for me to learn in the next 5 years or so and if I get that many I might consider exploring other areas... but Irish music is my first real love in music. I am far more interested in learning how to play it on other instruments (like the concertina) than I am in learning how to play other musical styles. While I don't want to sound like a session snob, I suspect that many participants in many fine sessions feel the same way about their session; its not that we think that Irish Trad or Blue Grass, or Old Time is better than other forms, but it is what we love, and what we want to play.
--
Bill