I'm surprised that we haven't organised anything either.
I for one would like to get together with people, preferable after the concert. But it's difficult for me to organise anything, since I don't know where in HP the concert is and can't remember much of HP, except for Speaker's corner.
I suggest we meet up after the show somewhere, and go to a pub or something, it's the last concert of the tour and this has to be celebrated...
Name the place, and Taija and I will be there. (And what's it with me and quotes these days

)