I would have thought it would be illegal to host something like that in a parking garage . Even if only part of the con was in that hellhole it still looks like some law was being tested here...
There is a reason why it's a park-your-car-n'-leave type of place. Garages have years of emissions build up plus whatever materials used in it's construction giving off fumes and god knows what. None of that can be too healthy for breathing in all day. Plus food was served here?! (HOLY SH*T GROSS)
Even if the garage wasn't leaking it's still an insult to do this.
KATSUCON2014: JUDE-Tails of Xillia | YOSUKE-Persona 4 | KANAYA- Homestuck