How do you survive with a room full smokers and drinkers.

I am currently staying in a 2BHK house near TinkerSpace. Finding a room here was quite challenging, but I finally managed to get one. It’s relatively clean compared to the rest of the rooms I saw. However, it’s unfurnished, so I sleep on the floor with just a mat. One day, when I came home, I found everyone in the house drinking and smoking. I am not someone who enjoys drinking or smoking, so I went straight to my room and locked myself inside. Despite that, the smell of cigarettes filled the entire house, making it very hard to bear. I don’t know what to do. I can’t afford better accommodations, like a two- or three-person sharing room. There are six people living here in total. What should I do now?