To narrow it down, non-wealthy people in central Europe. Would they be drinking wine, beer, or liquor? What kind of music would they be listening to, what instruments? Would there be dancing?
It will depend greatly on the income level and region. When you say "non-wealthy", do you mean merchants and tradespeople? Peasants? Do they live in a rural or urban environment? What country? Which region? A peasant farmer in rural Italy is going to have a very different party than a merchant in Vienna.