Well, not actually by night but in the afternoon between 4-5pm.
Had a chance to take some pics using tripod with Mariette. Noticed immediately the huge difference with the quality of night/afternoon photos. Without a tripod and timing it's impossible to take sharp pics in dark circumstances. I didn't concentrate on compositions just on the light situations and motion.
All the photos were taken near the Chain Bridge (= Széchenyi lánchíd)
Time to go to Media Markt to buy my own tripod and start practicing!