Just thought I'd toss out an observation...
Been listening to this system for a couple of hours this evening. Sounds like TGIDs 13 & 15 could be banquet operations. One call I heard was that a couple of [meat] carvers were on their way. Another call was asking for more ice and glassware. Definitely sounds like a banquet operation to me. Having worked at a front desk of a large hotel with multiple radio channels to monitor, what I'm hearing sounds a lot like what I would hear back in the day.