[Give him a moment to puzzle something together what he knows.]

The only roles that really work together are the Madame and the Bartender. [He won't explain how he knows yet.] Are you one of those?

[He wants that answer, first, before he'll explain the rest. He kicks a stray pebble out of his path.] I won't even mention this to our group from Sunday, by the way. There's no need to unnecessarily freak everybody out.