I would agree Thermae is a good place to find girls.. Some of the nicer / younger girls would stand nearer the staircase at the back or sitting under the signage next to the staircase. It would be really hit and miss. For me, I would say I enjoyed 75% of the girls I ST.
You can sit around the middle bar counters and enjoy the view around if you want.
During my visits to Thermae, I saw a few guys that look really Singaporean
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Happy hunting.