I don’t know about that restaurant specifically but there are a few restaurants and bars at the top of the property which are available to non-hotel guests (including Spago as well as the club lounge itself, which becomes a restaurant / bar open to the public after 8pm), and dining or having a drink at any of those would give you a chance to take a look at the view. There’s also a paid public observation deck area, though I imagine it costs about what a drink elsewhere would.