What prevail methods for crushing grapes in order to extract their juice?

The most typical techniques for crushing grapes in order to extract their juice are as follows:

1) destemming and squashing: the grapes are very first destemmed (i.e. the stems are removed) and after that squashed;

2) whole-cluster pushing: the grapes, with stems still connected, are positioned into a press and carefully squashed in order to draw out the juice;

3) foot-stomping: the grapes are positioned into a container, such as a barrel or tub, and crushed with bare feet;

4) device squashing: the grapes are put into a crushing machine, which utilizes steel or nylon rollers to squash the grapes. wikipedia reference