As Joey said, it's not a bad idea, but you're putting way too much effort. If you're willing to much that much attention in it, why not invite her to your place and cook. Or prepare food and go for a picnic if it's during the day.
I actually liked the idea as I read it but then the little phrase that the waiter says killed it. Just paying in advance and if she asks for the bill saying, "I already took care of it" isn't bad. If you need to go out of your way to impress the woman, actually do some note-worthy shit. Don't lie.
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Getting around the "who Pays" problem
The way I get around the problem is I'll always pay.
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1) if you pay, she might think you are a wuss
Or she might think you're a gentleman. Or she might think the money question doesn't bother you. Either way, never affected me at all.
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A morning of awkwardness is far better than a night of loneliness.
18 Body Language Mistakes I Bet You're Making