Innovation has no limits, when looking at ways to avoid taxes. Just look at Parisian restaurant Le Refuge des Fondue in Montmartre, where wine (both red and white) is served in baby bottles, in order to circumvent tax laws on glasses of wine (and distract attention from the quality of the wine!)....
It is not hard to satisfy your hunger in Prague. There are restaurants all over the place! The Czechs usually take lunch between 11am and 1pm and dinner around 7pm. Most of the restaurants – or at least the ones in the tourist areas – stay open from early...