If there are 7 homophobic people in a room with 7 LGBTQ + for 3 hours having to talk. Would the homophobic people change the way they thought about LGBTQ + people?

Some may, but most will not change their views

Homophobia represents fear, hatred, discomfort or distrust towards people who are LGBT-oriented. Whether seven homophobia will change attitude towards members of the LGBT population, after three conversations with them, depends on the causes and degree of their homophobia. Sometimes the reasons for homophobia pull the roots of conservatism, tradition, domestic education, etc., and can manifest in different ways, only to fear and distrust, and may have more severe forms. The most common cause of homophobia is ignorance and misunderstanding. However, as soon as the seven homophobes in the room together with seven members of the LGBT population, at least they will understand after three o'clock, that no one has forced them, nor was anyone from the LGBT population influenced them to change their orientation. They could have realized that they could talk to LGBT quite the same as with each other and that their orientation was not the reason for any fear or threat.