Ray said she keeps her client list in her office, and she implies that her office is in this bar somewhere. But the room upstairs is pretty much empty, so where -- ?
Hint 2
This is going to be involved, I'm afraid. Try looking for a door the bartender won't let you use, then find a way to use it.
Hint 3
That would be the emergency exit to the left of the bar. We just need a way to distract the bartender.
Hint 4
After you finish talking to Ray, she orders a gimlet, which comes in a tall top-heavy glass. Is there a way to use that?
Hint 5
Have Rosa stand by the emergency exit door, then have Joey blow the glass off the table. While the bartender is cleaning up the mess, have Rosa scoot out that emergency exit.
Hint 6
Okay, so here we are outside in a freezing alley with locked doors on all sides and without a coat. Want another way out? Think vertical.
Hint 7
If you look over your head, you'll see a fire escape ladder. If we could reach it, we could at least get back inside where it's warm.
In the secret room, look at the computer. Happily for us all, Rosa still has the memory stick from the Karth House (in an inside pocket where we couldn't see it, apparently). Click on the computer, and Rosa will copy a file named "clientlist.txt" onto her phone. Leave the room by going downscreen --
Hint 9
-- where Ray will demand the return of the memory stick. Surrender it happily; Rosa already copied the file onto her phone, remember?
Hint 10
You can now use that client list to get Jim to talk.