Romanians are know to enjoy a good party and Bucharest is certainly the centre of culture, nightlife and entertainment in Romania! You'll certainly not lack for something to do on weekends and with many pubs and restaurants often clustered in certain areas, it's not uncommon to have many people congregating on the city's popular streets at nightand it's generally safe to walk around at night. The most popular nightlife spot in Bucharest is centred around the Lipscani area, where there are plenty of restaurants, pubs and nightclubs. People often party till the early hours of the morning as there are no restrictions when it comes to closing times and the sale of alcohol.
Take a look at our page on Lifestyle and Shopping in Bucharest to learn more about what there is to see and do in the city.
You'll have a great time in Romania. The nightlife and social scene is fabulous and the Romanians really know how to party.
I was there a couple of years ago so I am sure some of the spots have changed but I would recommend you speak to the locals and try and make some local friends. Its the best way to really experience the best of Bucharest.
As Catherine has mentioned above a lot of the best places are located in the Lipscani area in Bucharest.
Enjoy Romania. I am sure you will have a great time.