storefront church
noun /ˌstɔːfrʌnt ˈtʃɜːtʃ/
/ˈstɔːrfrʌnt tʃɜːrtʃ/
(North American English)- a religious meeting place in a building that is not a church, e.g a shop/ store. Storefront churches are associated especially with evangelical or informal types of worship.