There are few working cash desks in the morning and evening, cashiers slowly punch through the goods. You can go cleanly for some water and get stuck for 20 minutes at the checkout.
Not a very extensive range)
In the evening, from 18.00 to 20.00, the queue is in three rows and only three of the six ticket offices are open... Unload the store, put a couple more cashiers on these 2-3 rush hours! Clean up the store during rush hour!