if so, it'll be simple. Just open NETWORK CONNECTIONS and click SET UP A HOME OR SMALL OFFICE NETWORK. In NETWORK SETUP WIZARD, follow the instructions and when asked choose to MANUALLY SETUP CONFIGURATION (don't let Windows do it automatically).
If you don't have XP:
Go to NETWORK CONNECTIONS and on your WIRELESS NETWORK CONNECTION, right click > STATUS. Check that the SUBNET MASK and DEFAULT GATEWAY are correct.
If it is wrong right click > PROPERTIES. Select TCP/IP and click Properties. Make sure that SUBNET MASK is same as the Hotel Network and make sure DEFAULT GATEWAY is the IP Address of the device which connects to the internet on the network.