It's in the FCC database, but under the name of a management company, M J Providence Management.
I found it by doing a geographical search and noticing the address matched. Under the callsign info, the contact number is the same as the Marriot, so I'm pretty sure this is the license.
ULS License - Industrial/Business Pool, Conventional License - KBB496 - M J PROVIDENCE MANAGEMENT CORP
It looks to be a repeater output on 464.475 and 464.775 with the associated inputs +5 MHz.
There is also a 4 watt license on 465.00 MHz.
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The search for everything from 100MH to 900MHz for a 2 mile radius around the Marriot:
Site / Frequency / Market Search Results