Tips for you. Try them when you visit RWS next time.
The 2cts and 5cts NON-PROGRESSIVE PRIZE Aristocrat machines such as 5Dragons, 5Koi and Fortune King located at the most far end of the RWS casino, smoking area. Try to pay them at ave $3/spin (2cts demo 150cr or 5cts demo 60cr )
These particular group of machines have (if I am not wrong) 93% RTP, most of them (8 out of 10) "response" within $200, if $200 don't give you a Free Spin, just give up, don't chase, swap machine. The only reason players lose money at this area is Greed. If you are not a greedy player and a Aristocrat game lover, you can spend your whole day and night at this area and even bring home with some profits.
I seldom choose progressive prize machines to play at RWS because I enjoy the game base payout and not hoping to win the progressive jackpot prize.
If you choose games such as 5 cts Good Fortune or DFDC, be ready to burn SGD1k in 2hrs with min bet.