My company will be attending a trade show in March, and the wi-fi could be spotty especially under peak loads. We don't really need Internet, we just need our Android tablets to be able to hit a laptop we'll have there. The laptop will be running a web server.
Is it possible to use a wireless router or something to enable the tablet to connect to the laptop by IP address, even with no Internet available? Please explain conceptually how to build / set this up.