Al ULA is a abandoned city inhabited by nabateaans, normadic arabs. Just like Petra. Perhaps sister city.
Archeologist discovered that early mosque or rather kiblat, were directed towards Petra and not Jerusalem or Mecca.
Later mosques we're directed towards Al Ulla. And only after this, mosques faces Mecca.
Partying, boozing, gambling already allowed since MBS took Over. Many years ago.