Most hotels have Wi-Fi or wired LAN in the room, but you will need to pay for each MAC address. Googling around I found the awesome free product Connectify that turn your Windows 7 laptop into a Wi-Fi hotspot. The setup is super easy and the program is highly recommended.
Now me and my friend are online with one Windows 7 laptop, 2 iPad’s, 2 iPhone’s and 1 iPod Tough sharing one internet connection. The built in stuff in Windows 7 was to much hassle to setup.