It's been quite a while since I've been to that venue, Sunset Station(used to be a nightclub), but I don't remember it being all that big. It is right next to the Alamodome, and it shares a courtyard area I think. This was from their facebook page:
"ACCC Halloween Edition is back this Oct 31-Nov 3, 2019 @sunsetstationsa & St Paul’s Square. We’re taking the party to the streets with concerts, comics, celebrities, live art, food trucks, & more!"
Michael Keaton will be there (my vote for the best Batman)