Question

Hello,
I live in a shared apartment in Givat Shmuel. I wanted to ask how this works in terms of eating with the roommates in the apartment, or roommates who come from other apartments with food, or when I go to other apartments. The roommates are religious, and as far as I know they come from religious homes, but I don’t know how well they really know all the various laws of kashrut, and not all of them are what you’d call careful about things like avoiding physical contact with women, and the like.