question:  Why did Billy-boy take Grannie Annie to the grille?
context: "Beg pardon, thir," he said with his racial lisp, "thereth thome one to thee you in the main lounge." The rule that no females could pass its portals was strictly enforced. There she stood before a frantically gesticulating desk clerk, leaning on her faded green umbrella. "Hi, Billy-boy," she greeted calmly. "Mithter Trenwith, if thith lady ith a friend of yourth, you'll have to take her away. In the grille an equally astonished waiter served us—me a lime rickey and Grannie Annie her usual whisky sour—I waited until she had tossed the drink off at a gulp before I set off a chain of questions: "What the devil are you doing on Venus? But to me she was still Grannie Annie, as old-fashioned as last year's hat, as modern as an atomic motor. Her annual income totaled into six figures, and her publishers sat back and massaged their digits, watching their earnings mount. If Annabella C. Flowers wrote a novel, and the locale was the desert of Mars, she packed her carpet bag and hopped a liner for Craterville. If she cooked up a feud between two expeditions on Callisto, she went to Callisto. Grannie spilled a few shreds of Martian tobacco onto a paper and deftly rolled herself a cigarette. Grannie Annie hailed a hydrocar. Grannie Annie pushed me into a seat in the front row. On the right were nine visi sets, each with its new improved pantascope panel and switchboard. Sharp and dear his voice echoed through the theater: " Who was the first Earthman to titter the sunward side of Mercury? " Doctor Universe nodded and turned to Grannie Annie who had raised her hand. When they failed, or when the Truthicator flashed a red light, he announced the name of the winner. It grew a little tiresome after a while and I wondered why Grannie had brought me here.
output:  No females were allowed in the club
options:  He felt he needed to be polite and take her to dinner.  No females were allowed in the club  He wanted to go somewhere where no one would over hear their conversation  He wanted to inspect the book she had been writing.