At Kathmandu you can also visit to Patan area or Jhamel which is a new area with different kind of restaurant and bars. Both Patan and Ghamel is 5-6 Km from Thamel area. At Thamel you can also listen to live music , enjoy the disco parties, spend you good time at tequila bar and beer bar.If you are a beer lover then please be aware of its price. In Nepal right now most of the restaurant and bar charges Rs 300-400 for each. It would be great if you choose to visit Nepal at Christmas time or new year time , because at this time ,the environment of Kathamandu, pokhara is awesome. Pokhara city is much more cleaner than Kathmandu and the price of beer is also little bit low in compare to Kathmandu, good thing is that you can bargain the price of beer and other alcohol in Pokhara.
You can see the nature of each restaurant and bar in Pokhara are quite bigger and cleaner in compare to Thamel Area.