Calls to Action:
They’re not just for Webpages

Using call to actions for social media sites such as Flicker, TripAdvisor and Facebook near the internet cable in a guest room or in the compendium under the WiFi section is a very subtle method of achieving this.

Alternatively a quick EDM with the information on what you want them to do is also a great follow up.

It's a nice concept, but using too much of that sort of signage could be a turn-off. Asking about a review on trip advisor upon checking out is a great idea, but hitting them up too much while they're there could be counter-productive.