I like to sit on the far sides, in the furthest seat right behind the row that opens up into the alley. That way if there's a fire or bomb or something I can jump up and over the seat in front of me and be right in the alley and make my escape, but I'm not actually next to the alley so I don't have to worry about somebody coming up and trying to shank me from around the corner without me having enough time to react.

Or in the back is fine too.