Any multi-phone chargers?

I often times throw parties or have a lot of friends over and generally all of them have Android phones. They usually come over later at night, so by then their phone batteries have been through a long day of use and they're always asking me if they can borrow my charger. I have a couple, but it's a hassle to dig them out and hook them up just so two people can cycle through them at a time.

I was wondering if anyone here knew of any multi-phone charging accessories for groups of people with dying phone batteries? Something like this, except all micro USB

 

Just ordered that along with a couple extra micro usb charge cords. Thanks, OOP!