Question:
Is a Jewish man permitted to seclude himself with a non-Jewish woman together with a non-Jewish man, or non-religious Jewish man?
Answer:
A Jewish man is not permitted to seclude himself with a non-Jewish woman together with a non-Jewish man, or non-religious Jewish man, because they are not considered valid shomrim (guardians).
Sources:
E:CH 22:3 & 5, Chazon Ish Kovetz Igros 2:159,
