OpenStreetMap
Here is a OverPass query for finding hotels and similar establishments claiming that they have internet access. According to internet_access it should not really be tagged, although the same wiki mentions option of using “internet_access:fee=customers”.
( tourism~/(hotel|motel|chalet|guest_house|hostel|apartment|resort)/ ) && ( internet_access:fee=* || internet_access=* ) && internet_access:fee!=customers
Discussion
Comment from amapanda ᚛ᚐᚋᚐᚅᚇᚐ᚜ 🏳️🌈 on 28 April 2019 at 15:15
Why do you think it shouldn’t be tagged? The wiki refers to things like private residences, not a hotel. It’s common for hotels to advertise that they do or don’t have internet access, so hence that data should be in OSM
Comment from HubMiner on 29 April 2019 at 16:56
Good point! I think hotels should be tagged with “internet_access:fee=customers” (last part of the query), unless they actively advertise free internet access for everyone (this seems unusual).