Use low quality shaders (only available on the PC version).
You won't get the notification popping up on newer versions of the game with the older maps, you must instead listen for the audio cue.
Replying to the posts above:
No one was forced to wear any of the hats that were there. Parody is totally fine, and doesn't necessarily show political affiliation (the event was hosted in Canada for fuck's sake).
The setup music I guess didn't really fit the tone of the marathon, but definitely understandable from a copyright point of view. Also, bonus streams are done entirely by the runners. If no one has a copy of Mario Party, then no one is going to put it on as a bonus stream.
Now for my thoughts on the event:
I really liked the chilled, laid back nature of the event. It felt a bit more personal with the smaller spaces, and I felt pretty at home. The casual/practice room was good for the amount of TVs and consoles that were there, but another PC setup would have been nice (perhaps one of the laptops in the room would have worked as well, but meh).
It was definitely a lot better organized than last year, with the tech issues being kept to a minimum. The schedule was relatively on time, maybe a few hours off, but nowhere near last year's delays. The organizers were especially accommodating, moving times around for those when needed. If the organizers weren't so flexible, it probably would have been worse off.
Overall, I found the event enjoyable, and do want to come back next year (hopefully still being hosted in the GTA).