Goss is a tiny wine bar,seats about 20. Wine and champagne is provided by the glass,three sizes from a dispenser.(50ml,80ml,100ml) I saw a similar dispenser in Italy.A good selection of French,Italian and Spanish wines with a couple of Australian and New Zealand. You start by loading a card with Yen. Credit card can be used. The loaded card is then used to access the wine cabinet. Depending on the wine and size prices seemed quite reasonable (Y500/Y1100) per glass
A small food menu is available,small dishes that were excellent. I had a quite "dinner" there one evening and went back twice for a post dinner drink. If you have a night off from official engagements this is a lovely place to relax for an hour or so. Goss is part of a group of bar/restaurants.
Ask the manager to show you where MASQ is. A small restaurant ,seats 40 or so.( about two small blocks away) Specialises in Japanese beef. Excellent.