Yahweh speaks to us through the Word of the Bible. Yahshua said in Matthew 4:4 and Luke 4:4 that man shall not live by bread only, but by every word that proceeds out of the mouth of Yahweh. We have His Word and that should be sufficient for us to walk the Kingdom way of life. The problem is, would Yahweh speak to individuals who refuse even to adhere to that? Yahweh also speaks through his messengers also, who preach the Word. But only those who are obedient to Him (Jeremiah 23:21-22). One person that Yahweh spoke to that we know of is Moses. But we all can't be Moses' and his job was very unique in delivering the Torah Law to the Israelites.
In the Bible it's clear that Yahweh speaks to His people in more than one way. Primarily it's through the Word, or through a Preacher preaching the Word, but a person who is living obediently and has the Holy Spirit may be communicated to through words (2 Cor 12:8-9), a dream or vision as well (
Acts 2:17).
I forgot to address what you said about group prayer. Yes, Yahshua said to go in to one's private closet to pray, but the apostles prayed together many times and this proved very effective (
Acts 4:31). I think we can agree that if you want to pray you should do so privately, but if you are with other believers, you may pray together in the same place. The problem is, praying in a place where you can be seen by others to make yourself look righteous.
