While outdoors, remember not anything goes. Make sure you’re setting up where you’re allowed to and where it won’t disturb other people. As in people not invited to your outdoor cinema. So perhaps the front of your house isn’t ideal, but the backyard or back garden will work very well as long as you keep the volume reasonable and maintain considerate show times. A garage will be nice, but perhaps you may find that a tad stuffy. Also, public parks, campsites, and beaches work amazingly well because your viewing experience gets augmented by the majesty of nature. Just make sure you’re permitted to setup there.
Effectively, any place where it’s legal, allowed, and you feel safe works as a good location for an outdoor cinema slash viewing location, that’s how versatile modern portable projectors are. Of course, ensure the venue matches your audience. Twenty people in a tiny backyard or a small garage may be…awkward.