Keep in mind that most, if not all, suggestions for restaurants, snackbars and especially their discount offers in this thread descibe last year's status.
Mystifur already noticed when composing this year's flyer that some of last year's ventures actually went out of business! Nevertheless there still will be restaurants offering discounts, and there are also some interesting sightseeing spots around the hotel, like the "Hundertwasserhaus". Like last year, there'll be a comprehensive flyer in your conbook showing you various places of interest, and where you can get discount by showing your badge.
Therefore, if you're the spontaneous type, I'd simply grab the flyer when you arrive and see what strikes your fancy! There's more than enough furs around who'll likely allow you to use their laptop and internet connection, too, if you'd like some extra info on-site.