A beautiful mid-summer week in London lies ahead, and if you follow Londonist's instructions to the letter, you'll get some free champagne, flowers, live music, and, yeah, even some funfair rides out of it. You and your rolypoly pocketbook can thank us later. Monday: Two films for the price o' one: now that's a deal London On The Cheap can get right behind, popcorn in tow. Rising director Aaron Katz is showing his two......