I don't know how much of a draw a Weeknd house would be to non haunted house fans. I know if my favorite band put on a 90min concert and told me to go experience their other medium thing, and it was paying $100 to wait in line for 90 minutes to experience snippits of a few songs lasting a total of less than 3 minutes I'd feel pretty ripped off. Not to mention $30 to just park at the event.
That's a pretty hard sell. Especially when the event is only in two cities and not on tour.
Bands/Artists have done art/photo exhibits, book tours, etc that never seem to move the needle. Huge A-list actors, like Johnny Depp (pre Amber Heard), have had bands that played in small clubs and not arenas and stadiums as the demand just isn't there. You want your favorite singer to sing and your favorite actor to act.
Now, anybody on the fence about going...or people who are already going to Universal and make a knee jerk reaction seeing in park sineage very well might be drawn in because of the Weeknd, but I think the draw of concert goers in the north east, mid west, or internationally will be minimal.