I'll second the earlier report about champagne being available on request in the GVA lounge. It's the little bottles that they hand out in flight on CE.

On the other hand, especially for the last two flights in the evening, don't count on there being any food available other than crisps and nuts. Occasionally they will put out a single plate of filled rolls (i.e. 4 or 5 rolls), but with 30-odd CE pax and usually a few status pax too,they are gone in seconds. I've seen a plate emptied by pax hovering outside the kitchen door, before it made it the 3 meters to the bar!