Good area to be in, you're close to the action. Only a few minutes away from Crescent street where there's always something happening in terms of bars/clubs etc if that's your kind of thing.
One of my favorite areas of Montreal is the Plateau, again more bars/clubs on St-Laurent street but also a whole sleuth of restaurants. If you're a beer drinker you owe it to yourself to go check out Dieu du Ciel which is around that area as well. World renowned beer, ever changing menu of beers. I've yet to try vaping in that place, but there's only one way to find out if it's a vape friendly establishment

Then of course there's the mountain not too far, and I'm pretty sure you'll be able to see the
Tam-Tams even in late September. A bit further up the mountain there's a really great lookout point with a view of the whole city.
By the water there's the old port which is a very popular tourist hangout. Lots of cafes and terraces, although it might be a bit chilly late September (welcome to Montreal). I work in that area so we could always meet up for a "vape lunch"
You should also go see the Circuit Gilles Villeneuve, where the F1 race takes place. It's on a tiny little island south east of Montreal (15 minute drive from where you're gonna be), and the casino is also on that same island.
Judging by your picture I assume you like to fish? You can go on the canal Lachine, which is also a huge bike/rollerblade path. You can also go a bit further down and stop at this other awesome brewery called McAuslan.
If you're into hiking/mountain biking etc. you should rent a car and drive up to Mont-Tremblant national park which is about an hour and a half away from Montreal. Absolutely amazing.