There should be free late night snacks in both Promenade Lounge and O'Gills Pub. Cove Café should also have deli meat/cheese/olives/crudité in the evenings. On our 2016 Alaskan Wonder cruise, we found it hard to find any late night 'sweets' other than the soft serve ice cream machine...when it wasn't being cleaned that is. Next cruise, I'm going to get some sweets (likely from Cove Cafe) earlier in the day and put them in our fridge to enjoy after the show! You can also do the free room service! (Got the 'All hands on deck' plate and 2 mickey bars on our last night!)