That is the question. Going to a snack can be a memorable experience. If only because you try so damn hard to remember where all your money went. The first thing that comes to mind is a sex thing. This is both true, and not true, as well as partially true.
Some snacks essentially serve as a cover for prostitution.
Others are truly classy places where people come to relax for a while. There are several different methods of drinking at snacks. Every snack, and most bars in fact, allow you to purchase a bottle of liquor which is to be kept on the premises. Every time you return to the place, you drink from your bottle. The prices for the bottles are very high.