It seems like they have excluded Brisbane as well when I have a look today. On their website https://www.accorhotels.com/gb/leclub/program/cards-status-benefits.shtml Access to Executive loungeUpon request and subject to availability on arrival at the hotel, if existing (except Sofitel Melbou...

Yes it's open 24 hours. Also , it has a quiet zone that you can sleep. However, it's not sound proof. Some people may snore louder than you can imagine. Suggestion : Get ear plugs with you.