Hi mums and dads, any recommendation for some adventure night for couples? Thanks!

Have you tried reverse bungy at Clarke Quay? There are couple of rides that are just insane. If you and your partner are adventure types, this is something you should definitely try out http://www.gmaxgx5.sg/ Also, you can go for camping http://sgtravelinfo.com/things-to-do/camping-in-singapore-top-5-camping-places-in-singapore/ Have fun!!