On Saturday night, popular indie/electro night London Calling held its "grand opening" at the loft above Shock City Studios (2200 Gravois), which represented the fourth venue change for the club in three years (and the third in the past year). The dance night began at the Upstairs Lounge on South Grand and moved to bigger digs at the Stable in late 2008 before capacity issues shut it down. It moved to the Halo Bar on Delmar before heading back to the South Side late last month. We talked with th