Interesting, I've contemplated this many times myself, not just in terms of Flounge, but also at SYD and MEL J Lounges.
I like to play this game: 1. Count the number of women vs men in the lounge. 2. Count the number of women in the lounge who are not travelling with a guy. 3. Count the number of the remaining women (travelling alone or with other women) who are under 40.
If nothing else, it makes me feel special.
I think it reflects the following:
a) Men are much more likely to hold senior positions, which usually involve more work - related travel.
b) Women are less likely to accept travel opportunities at work due to family commitments
c) Women are less inclined, generally speaking to travel alone, and if they do, they're likely to do it the most efficient way possible.. few have the patience for extra connections to achieve status.
I have told my friends that the lounges, particularly the J Lounges are a fantastic place to meet men, and by and large, filter out less desirable guys for you (eg. you know that 90% have jobs and/or means). Ladies have their pick with the gender imbalance... just look out for wedding rings.
I wonder how many hookups based on apps like tinder have occurred in the lounge? (Off topic - sorry).