YES and NO.
Yes you can connect to laptops together and do networking.
No[means maybe], cause it depends on the game. If the game requires to sync with the Online Server, you might not be able to play without the internet connection.
If the games require you to connect to other player using IP address, then Yes, its posssible.
Google "Ad-hoc network".
Here's a link from Microsoft
on Setting up Ad hoc network.