Bluetooth Automatically Pairs with "Broadcom Bluetooth Device"
Running Mojave 10.14.5 and also experiencing the EXACT same issues as described. 

Currently tried deleting bluetooth preferences files, resetting the bluetooth module, and restarting my macbook to see if I run into the same issues. 

If same issues persist, then hotel rooms may be a pain in the a** till a concrete solution is found.



UPDATE



Followed answer in this post to add a MAC address to the "IgnoredDevices" in the bluetooth.plist file and it seems to be working.

Using the terminal, Type sudo defaults write /Library/Preferences/com.apple.Bluetooth.plist IgnoredDevices -array-add '' 

Good Luck!