True worship does not need a building, musical instruments or air conditioning. True worship cannot be scheduled on a calendar.
1John 2:26-27 26 I write these things to you about those who are trying to deceive you. 27 But the anointing that you received from him abides in you, and you have no need that anyone should teach you. But as his anointing teaches you about everything, and is true, and is no lie—just as it has taught you, abide in him.
Matthew 18:20 For where two or three are gathered in my name, there am I among them.