Well it very much depends on personal taste, a plan could look like:

1) Eat outside the lounge, the food in the Galleries lounge is inedible a part from continental bfast;

2) Explore and enjoy the lounge (there is no Champ in self service, but you can ask waiters to bring a glass to you. I usually ask for 2 glasses as they tend to be quite slow in serving due to the passenger-waiters ratio);

3) Enjoy bottomless champs during the flight.