POP Montreal runs September 23-27, with shows and festival events starting to stack around the city. If your band is playing, watching, or using the week as a deadline, the room has to be ready before the calendar gets noisy.
Use one rehearsal to check the practical stuff: where the drums sit, whether amps fight the vocals, what gear can stay in a monthly room, and whether one hourly Du Parc block is enough for a tight pass.
If the room is still a guess, use the gallery first and book a Marsonic visit next. Ten minutes inside will tell you more about load-in, access, size, and recording fit than another group chat.