Adam Clarke on Judges 19:15

No man - took them into his house to lodging - There was probably no inn or house of public entertainment in this place, and therefore they could not have a lodging unless furnished by mere hospitality. To say that there were no inns in those primitive times, is not true; there were such places, though not very frequent. Joseph's brethren found their money in their sacks when they loosed them at an inn, Gen 42:27. The house of Rahab was an inn, Jos 2:1. And the woman whose house Samson frequented at Gaza was a hostess, or one who kept a place of public entertainment.