Lee, 

You cannot necessarily rely on disabling NetBIOS via DHCP, as a client
machine may have the option set to always enable NetBIOS on its WINS
settings tab, thus defeating the DHCP option and leaving it vulnerable.

Assuming a wireless infrastructure in the hotel as is the norm,
configure the APs for client isolation so that no client can communicate
with another. This will mitigate the problem.

Richard