Which part of their website front page which says "BRISBANE'S BEST BROTHEL ON THE SOUTHSIDE" makes you think that it might be a brothel?
Maybe my After Report from last week (copy-pasted from PP) will help you.
In sum, of course it's a brothel. As for a large number if Indian ladies: Sure, if four is a large number (and one of those four looks Chinese).
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I visited Rose Castle again (second time in a week).
"Standard" rates (shop and lady):
30 mins 150 / 45 mins 210 / 60 mins 270.
Add GFE/extras as discussed by each girl in private intro room. (Between 100 to 150).
At intros, I met Indian girl Aman. Late 20s size 10. Okay looking, not Bollywood. $150 gfe extra, including DFK.
Also met Sofia - supposedly Indian- Australian but actually Chinese-Australian. $100 "GFE" no DFK. (How is that GFE???)
Met a few others at the intros. Tiffany, Rebecca and a couple more. All want 150 for GFE extras, some do DFK, some don't.
Had a good time there with a new discovery (twice in a week). Maybe I forgot her name, maybe not.
https://rosecastle.com.au/ladies/