Ooo yay! Got it working now. I apologise, the pubdate it seems was the same as the event date. Which doesn't make any sense but does mean it will work.
Just got to figure out how to get the actual venue name in the listing, which is probably going to be hard as the actual venue name isn't in the feed's information...
If you can link the venue to the feed, you can use one of the string bits to specify it manually, then instead of one feed block with multiple urls, create one feed for each url, add the venue, and use the union one to combine the results.
(or something like that - on my mobile at the moment, so can't check specifics)