I used to keep my bikes in my garage but when we lived in Houston my best bike was stolen. Then later he came back for the helmet. Then there is the dust and dirt daubers and spiders. My bikes stay in the house now. In my basement shop I have a few hooks in the ceiling and a bike works stand. I also went to Northern Tool and got the two bike Gravity Stand which will hold a road bike and a MTB (ATB) nicely.
But, the bike that I ride the most, grab and go, it stays in the living room leaned against the stair rail.
LC