Not necessarily Irish, though it's true that modern Irish-style sessions sometimes have less variation than other kinds, and can get a bit dull for those not in a position to join in. On the whole, I'd guess that "woodsie" might prefer a singaround of some sort. I expect that SE London has those, too; but I moved North long ago and can't advise.

What would you have preferred? If, for instance, you're a singer/guitarist, there will be limited opportunities for solo performance in an instrumental session.