The most out-there, and controversial bar I have ever been to was The Clinic in Singapore.
Located in the heart of bustling 'pub-hopper' central Clarke Quay, The Clinic cannot be missed. Why? Because it resembles a hospital. The furniture consists of hospital beds and wheel chairs, and their cocktails are served in syringes, IVs, and test tubes. WTF! Right? That's exactly what I thought too!
Six syringe cocktails for $50, and six 'mood tube'...