Well, that was quite a toughie! As others have already noted, it seemed to be quite a bit more difficult than the last few weeks' puzzles. I nearly gave up with less than a quarter completed, but getting 34 gave me the letter I needed to establish the venue for the thematic event.
As I'm more of a fan of e.g. 13s than of the thematic end product, the endgame took me a bit of guesswork and Googling. Still without a parse for 28 though - please could someone supply one? Thanks!