Checked on overpass turbo and there is already a large amount of cafes listed with internet access: https://overpass-turbo.eu/s/1BeP
https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dcafe
https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dtoilets
https://wiki.openstreetmap.org/wiki/Key:power_supply
One can always make creative frontends for OpenStreetMap data, while participating in the shared crowdsourcing.
https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dcafe
https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dtoilets
https://wiki.openstreetmap.org/wiki/Key:power_supply
One can always make creative frontends for OpenStreetMap data, while participating in the shared crowdsourcing.