Hello and welcome to Montreal my friend,
Though I'm just a beginer and nowhere near as good as Real and Daniel, I can confirm that I will be at Mt St-Bruno monday and tuesday morning as well. We also end up with 5-10 hardboot riders every fridays around 8:30. Otherwise, you stand a pretty good chance to meet other hardboot riders on tuesday evenings between 15;00 and 19:00.
Keep in mind that mount St-Bruno is laughable in size compared to european ski statioms, but it's nice to know that you can drive less than 15 minutes from downtown MTL, ride for one or two hours and then pack up and leave.
Cheers
Erick