One on a work stand, when storing I raise it as high as it can go... then put the other bike directly underneath it. Tires behind, parts in boxes, tools in a toolbox...
I used to live in hotel Staff accomodation in a 10ft by 6ft room with a 4ft by 10ft bathroom . I had 2bikes, snowboard so used to keep 1 in the bedroom and one standing up in the shower It was a pain when I needed a shower . nowdays just in the garage
I keep one in the living room... one is at the shop.. one is at my friends place.... And last but not least my snack time go getter is at work parked at the front door for quick get aways