 In the main mosque in Mecca, the Imam (prayer leader) performs twenty rakat and then you pray your isha witr prayers.The total number of people joining the tarawih prayers in the main mosque in Mecca may reach 3-4 million.They fill up all levels inside the mosque, the flat roof, outside in the courtyard, some nearby streets (which are closed off), and on occasions even using up space in the lobbies of some nearby hotels.