Prayer is a communication between God and man, this means that just when you meet together in a room praying, the room turns from being a normal place to being a House for God. God enthrones as King of the meeting. Hallelujah. God's desire is to head His house no matter how small you see it. Don't look down on the ministry you are doing whether in the church or at home or elsewhere. Wherever you meet to call on the name of the Lord is your house of prayer. You can look through church history till today and it will amaze you that most ministries started with two or three people, whether family members or co-workers or just friends. This is because they met as just friends or family but with God as the owner of the house.