Muscat's nightlife doesn't really consist of getting drunk and acting out, mostly because Oman is a Muslim country, but the nightlife is still rich. There are nightclubs and bars where you can get a drink and dance all night, just make sure that you do that in your own limits.
One of the best and most popular nightclubs in Muscat can be found in the Grand Hyatt Hotel. It is called Copacabana and here you can get a variety of drinks while listening to African, Arabic or Indian music. On the weekends, the club usually hosts a DJ which plays R'n'B and Hip Hop. Copacabana sometimes organizes special events and live performances.
If you are looking for a place that has live music and dance performances then you could visit the Al Ghazal Pub. This pub is furnished like an English pub and hosts an entertaining quiz night where you can check out how much have you drunk. The pub offers excellent European fare and has big TVs that play sports events. It is located in the Inter-Continental at Shatti-al-Qurm.
The Al Maha Piano Bar can be found at the Al Bustan Hotel. It is an upscale cocktail bar with comfortable leather furnishing where you can go if you want to have cocktails or wines and spend a quiet evening of taking with your friends.
The nightlife in Muscat is more about getting together and talking then partying and dancing. However, there are certain nightclubs that also offer the experience of a fun night out dancing non-stop.