"Central to any traditional Irish music session" ?

I suppose you can interpret the term, and I haven't been to many Irish sessions lately, but according to a piper friend of mine if there's an instrument to take to an Irish music session that will make everybody look to you for a lead, it's not the bodhran - it's the Uilleann pipes.

Oh well, why should I nit-pick? It's only marketing blurb.

Anahata