Is the remembrance for leaving the mosque recited after leaving the prayer area?

The remembrance (dhikr) for entering and exiting is prescribed only for mosques. These are places dedicated to Allah the Almighty for prayer, owned by no one, and not for sale. This differs from a Musalla (prayer area), which is merely a place for prayer and can be sold or disposed of. However, if a Musalla is endowed for Allah the Almighty and made available to the public, then it is considered a mosque, and the rulings pertaining to mosques apply to it.