Are interfaith dialogues, via events and organizations, effective in bringing people of different faiths closer together in harmony, understanding and mutual respect?

There are some organizations in the US whose mandate is to bring Muslims, Christians and those of the Jewish faith together through events and causes which benefit the general population as well as creating venues to have open dialogues and exchange ideas. If you have heard of these organizations and practise any of these religions, I would like your opinion on whether you think they have been effective (if so, how), or not (why not?).