JW Marriott in Bucharest
Nachos, there are good restaurants in Bucharest though it's not exactly a culinary capital. The local food is not remarkable but there's lots of options for good European/ international food. Having said that Many of those are either by the lake or in the historic centre and in January there isn't much going on.
Btw, the steak house in the JW is quite good - just to stay slightly on topic :-D