I researched these chips four years ago and came to the conclusion they were used in the Band Box Club, at least initially. The chips were sent to the Tropical Hotel, but there is no indication that gambling took place there. The owner, W. D. Dennis used the Tropical Hotel as his office.

You can read the entire article here:

http://www.marlowcasinochips.com/links/genetrimble/illegaloftheday/WDDennisTX.pdf