[miranda_rights]

I had a similar reaction when I lived in Austin. I'd walk down 6th street (one of the streets with active nightlife) and bars would leave their doors open with air conditioning blasting out onto the sidewalk. I still don't understand it - it just seems so wasteful.

[zone411]

They probably think that open doors look welcoming, you can hear the music playing inside, which might attract people walking by, and just that if others are doing it around your bar then you should do it too unless you want to appear closed.

[A_Parr]

Cold air blowing out the doorway onto passersby is just as inviting as the music.