DANCE: German electrohouse duo Booka Shade returns to Toronto for what will undoubtedly be a sweaty, sweaty dance party at CiRCA tonight. Hey, remember when CiRCA first opened and everyone was being all “Yeah right, I'm never going to CiRCA!"? Looks like the joke is on you, if you're a Booka Shade fan. CiRCA (126 John Street), 10 p.m., $18.50. SHOPPING: Although it's not technically a real IKEA, products from the 2009 IKEA catalogue are......