Personally, I think that you're all crazy. Three relatively close hotels in three consecutive nights? Unless you're really close to PLT and need these extra stays, that's an awful lot of hassle and schlepping, not worth it at all, IMO. The ROS breakfast can be purchased, of course. No need to stay there unless you want to. SGS service is best experienced as a guest (all non-guest services really boil down to F&B), so I would recommend actually staying there. I find LM to be über cool (i.e., far cooler than I am). No better way to experience the coolness and location than by going for a drink in the trés chic bar in the early (or late) evening. (I keep forgetting, cool people go out much later than I.)