Here, let me help you folks.
There is a book outh there which gives a sorcerer (or wizard) the ability to enact an Energy Substitution feat simply by changing their spell components. THere is another ability (High draconic) which allows spellcasters to significantly improve their arcane spells by making a Skill check to "speak" High draconic when casting spells. (If they pass, they get additional powers, if they fail, they could actually destroy their own connection with magic, that sort of thing.)
So, i'm guessing he's allready replacing his components for a bigger bang, and chanting draconic for extra oomph, now he wants to do an interperative dance for additional firepower.
No, I am unaware of any feat or publication on improving your spellcasting abilities in the Bob Fosse school of magic.
Though, nothing's stopping you from Writing one, and selling it here on ENWorld then getting a copy for yourself and taking it to your DM for approval.
maybe making a "perform (Sensual Broadway Choreography)" check would work.