There is action in Amman but its very hidden. You will need a taxi driver to take you there and it is a Bar full of hookers from all over middle east (so they say).
How it works is you need to buy drinks and then you can take them home after a few. So its not like a brothel they try and make it out as a legit bar. When i went 3 years back there was about 20 girls there lots of security. You also cant take them back to hotel it has to be apartment. Due to the risk of this trade in a muslim country i did not go ahead with it.
p.S. drinks and snacks are overpriced