Yes you can but make sure you don't have a game that needs to constantly be attached to WiFi. Most games don't have to be.
Physical games are ones where you have a physical copy. Put into the system each time you play
Pro: You can sell the games
Con: You have to change out the cartridge when switching games
Digital games are downloaded to your system thru WiFi
Pro: Can't lose the game as it is saved to your account
Con: Can't sell or let friends borrow