Wiki actually has a description of the Mandalay Bay building.
https://en.wikipedia.org/wiki/Mandalay_Bay
...the Four Seasons Hotel is independently operated within the Mandalay Bay tower, occupying 5 floors (35–39)...
... Levels 40-42 (numbered as floors 60–62) are designed as penthouse suites, with a penthouse lounge on level 62 for guests staying in the penthouses. Level 43 (numbered as 64) is the Foundation Room, a restaurant and bar...
Thanks. So, 32 is NOT part of 4Seasons.
Back to my original query: LE-chatter indicated gunfire from 29; any official explanation?