Motels: in the world of terrorist "tradecraft", Muslim owned and operated motels and hotels are considered prime "assets". Terrorists who know the correct salutations will get room and board and all without records, incuding lookouts, fresh prepaid cell phones, switch cars, garages to hide cars etc.
Motels will be seen to be a prime part of the muslim terrorist infrastructure, mark my words.
Along with taxi companies, delivery services etc.
You are right! That's probably a more likely refuge than a mosque.
Identifying and observing every Muslim owned motel or hotel will be a challenge. But you hit the nail on the head.