Does the Frankfurt Hotel in Germany have free wireless Internet access?

Most of the new express hotels in Frankfurt have wifi, so it is generally necessary to get the wifi password at the front desk, and in most cases, a device needs a password, and their passwords are all bound with mac codes, so if you bring your mobile phone pad and notebook, remember to bring three passwords. Otherwise, it cannot be shared. There are also high-end hotels, but some old small hotels are hard to say. However, I have been to several ordinary hotels. After all, it is a German metropolis.