Radniční sklípek is one of the most favourite restaurants in Liberec. It is situated right in the centre. You can taste there mostly the Czech specialities, for drinking you can choose a delicious beer from the brand Svijany. 
With an ESN card you can get a 10% discount for the whole bill from 3 - 11pm. It is applied to the drinks and meals in the pernament offer, not for the daily menu.