Yes in the lobby, but if you enable data roaming and mobile data you can use your cell phone. Rates depend on your carrier. Koodo is $8 per day. Or you can get a pay-as-you-go Cuban sim card for $40 and have a Cuban number. They have cell data now and it fast and charged by the gb, so if you only text and don't watch video, it's very cheap.
Get an answer from Hotel Rancho Luna staff and past guests.