in Costco
Quebec restriction of customers admitted to commercial establishments (including Costco)
So most Costco warehouses would be limited to about 450 people at a time and that hasn’t been an issue for me as I plan my trips around the quieter hours. (usually right at open, mid-day or a few hours before close)
If you live in a larger city you should plan around this as you may have to wait in line to get in, so you should go in prepared for the weather! (I made that mistake a few times in the early fall and wasn’t too happy about my choice of “no jacket” More