Riga is a beautiful and romantic place - mind arrogant and usually shit-faced Swedish and Finnish tourists (This is sad, actually).
Reval Latvija Hotel is in the center of the city - the most obvious advantages are:
-The hotel hosts a bar on the roof - Skybar with the best city view on the 26th floor of the hotel.
-Amber night club on the ground floor - a chill, lounge-type place, with a great music and friendly staff (http://www.revalhotels.com/en/Hotels/Latvia-Riga/Reval-Hotel-Latvija/Business/Entertainment-and-nightlife/amber-night).
-Price-wise affordable (go for Reval Classic, though)
A combination of the friendliness of staff together with price/quality, central location and availability of both the Skybar and nightclub makes Reval Hotel Latvija probably one of the best places to stay.