Three years ago, the Apple Walet app was updated to support office keys, digital ID cards and even hotel keys. Now with Google Wallet also starting to support many features more or less the same as Apple, they are also starting to add hotel key support.
According to the Google Support website, the method of adding a hotel key to Google Wallet is the same as adding a debit or credit card. Users need to go to the website/application or follow the email instructions to press the "Add to Google Wallet" button. After finishing, depending on the Android device you are using after the device is unlocked just touch the back of the device to the hotel door knob to open it.
Too bad, unlike airplane tickets the majority of which automatically support “Add to Google Wallet” – hotels have to work with Google themselves if they want their keys to be able to be added to Google Wallet. So far only one hotel has been confirmed to use this feature, the Clarion Hotel Post in Gothenburg, Sweden.