This document summarizes the methodology and results of a mystery shopping program to evaluate the marketing effectiveness of beer producers in Eastern Europe. 10 mystery shoppers visited establishments and evaluated them based on a survey form developed by the client agency. The survey assessed criteria like interior quality, personnel competence, politeness, sales efforts, and service speed. Most respondents recognized Brand #1 by its slogan, while Brand #3 had the least recognizable slogan. The research concluded personnel courtesy was generally high, but staff competence on product knowledge needed improvement, especially in bars.