I believe things have changed somewhat since the A388 services were introduced.
I have seen reference here to the existence of a new section reserved for First/Emerald.
I'll try to dig it up.
Yes, there are two sections. When I was there a little over a week ago, business class was directed to lounge number 5 (turn left at desk and end of the hall), and First was using lounge number 3 (turn right at the desk I believe). It was clearly signed on the TV monitors and passengers appropriately directed by the desk agent. Lounge 5 has a small "games" are for kids.
I only accessed the business lounge. Food was basic. Softdrinks, wine and beers etc in the fridge/counter. Other drinks available on request and delivered by the roaming staff. Bottled water in the fridge.
The biggest issue was access to showers. There were only 3 showers and lot of people wanting to use them. The lady looking after the shower facilities did not speak very good English and did not understand the concept of a waiting list. She just kept telling people "All full. Very busy". Eventually I stood waiting outside the lounge in front of her she got the idea I wanted to be next-in-line. Others then followed my lead.