You guys are all weaksauce.
I'd give her a warm smile, strike up some conversation before she takes my order, and constantly admire her body while she isn't looking (that armpit looks to be very delicious).
Then, I'd pay a different waitress for a copy of Konata's work schedule and her silence when nobody is looking so that I can time my visits to her schedule.
Then I'd look online for some special promotional anime/manga material she obviously wants badly to subtly place on my table the next I come around to the restaurant to spike her interest.
And maybe look up her Facebook profile.