it seems very unreal but what i have found is that strikes or intro which is most common in college campusses are really very very helpful in one's personality development. most of those shy guys you just force them to attend the strikes. i bet you will surely notice a marginal development in their personality. they will start raising their voices.
the strikes not only help in personality development but also make us feel that we too are important and are recognised by the management. that is we gain a lot of self confidence their. strikes not only increase our self confidence but also compell to think us logically and ethically.
strikes also makes people to know other people very clearly and in a well defined way. not only this strikes makes people relax from the tedious works and the bored routine life.
now intro helps us in giving the logical and accurate answers. make us aware that we should open our mouth only when we stand for it and can support our arguments firmly. we should have a strong background of knowledge. etc...