We had been hearing about the imminent demise of Cleveland Park’s 7-11, located at the corner of Connecticut Ave. and Porter St. NW., for a while, but after being reminded by City Desk that the convenience store did indeed shut its doors on Thursday, joining the Starbucks and the Magruder’s Market on the growing list of neighborhood retailers who are giving up rather than face increasing rents amid a bleak economy, it’s still hard to fathom. Who knew 7-11’s, in all their ubiquity, could even go out of business? Granted, this location was at the top, rather than the middle, of Cleveland Park’s commercial corridor, perhaps making it not quite convenient enough, but still. Are people really buying fewer Slurpees, packs of gum and nutritionally questionable taquitos? And wouldn’t these Cleveland Park landlords trying to raise the rent prefer to have some kind of paying tenant, rather than no tenant at all?