Like I suppose you could understand him talking about 'they don't like groups of men, I know' as meaning outlaws, or even interracial friendships, but given the context of this side quest I think it's not either of those things
From Third Wheel to Star of the Show Behind Closed Doors.
Maeve and Johnny were less and less careful, almost wanting to get caught. It seemed that keeping their hands off each other was becoming nearly impossible. Their shared desire crackled in the air, fuelling their risky behaviour. The thrill of the forbidden was like a magnet, pulling them closer together despite any looming consequences.