Underground Metro to the Hotel
The tunnel leading out of the main square of the station towards Bonaventure Metro is clearly marked, but once you're in the tunnel, it gets wacky. You go on and on past little shops, wondering if you are secretly on your way to Wonderland. You will reach a point where if you continue forward, you will spill out onto a street. There are unmarked escalators to your right, heading further down the rabbit hole. Take them and continue.
After that you will eventually reach another fork in the path, divided by a Booster Juice. To your left is a short tunnel labeled "Stationnement" and to your right is a longer tunnel labeled with a street address in the thousands. If your French is not great, you may think that "Stationnement" means "Station" and therefore the Metro, but this is false -- it means "Parking". Take the right hand tunnel with the mystery street address instead.
What you will actuually find down this tunnel is more escalators and the metro. Don't ask me what the deal is there; I have no idea.
Once you get to the Berri-UQAM stop on the Metro, as per Jo's instructions on getting to the hotel, how to get from there to Place Dupuis is not cearly marked. Head up following the red exit signs ("Sortie") and then, once you have actually exited the turnstiles, stop. Walk around the whole square until you find a large yellow bank. It looks like this. Look up -- you will see a very small, fairly useless sign that says that this exit tunnel is the way to Place Dupuis. (This is the only place where it says anything.)
Take that tunnel. There will be one more sign eventually, so you know you have gone the right way!
Eventually you will come to another fork, with unmarked escalators on your left and revolving doors leading to "shops and restaurants" (in French) to your right. Take the revolving doors, and go up the stairs/escalator beyond them to a food court.
There are four exits tunnels leading out of the food court -- two behind you, right and left, and two in front of you, right and left. None of the signs here will tell you where to hotel is, so don't bother. Just take the forward-left one. Signs in this tunnel WILL tell you that you are on the right track to the hotel, though it's kind of useless because you had to know already to get into it.
After that, you're fine. Just before the tunnel spits you out onto the street again, there are double doors on your right with the hotel name on them. You have finished the maze! Congratulations.
(Amusing: When you do this route the other way around, from the hotel to the metro, it is competely obvious, even the first time. They really only seemed to have planned for one-way traffic! This is the only reason why Jo, bless her, was not in a position to realize.)
IF YOU ARE COMING IN THROUGH THE FOOD COURT AFTER 9PM, IT WILL BE CLOSED. Or after 6pm on Sundays. We discovered this tonight. It's still faster to go through the food court than go around above-ground, but you have to go on another minor adventure: When you get up the stairs/escalators to the food court, you will be met with locked grating and cannot continue through directly as earlier in the day. (Gandalf sez: "YOU SHALL NOT PASS!") If you follow the grating to your right, though, it will herd you into a pub. Just inside the pub on your left is another exit into another bunch of locked grating. Take it and allow the grating to herd you to an exit out onto the street. You are now like thirty feet away from the hotel front entrance on your left. So you still have to go above-ground but not much, and it's still faster.
If you have magic balls of yarn handy -- and knowing some of you, you probably do -- then pass them around, hey?