The "you don't have enough sparkle for this many people" message makes me kind of sad. If it's a coding/crashing/lagging issue, ok. But could the sparkle effect be localized then, like Transcendental Radiation, so I can run around a street and spark it up a little bit at a time? Maybe make an alternate high-powered recipe available for us alchemists? One that's really expensive to make so it doesn't get used too much?
The places I most want to use it (parties, long lines, Ajaya Bliss, Neva Neva) always have too many people :( Sparkle! Everything should sparkle! Except vampires of course.