i'v answered so many questions like this one i could give up but u said u were a gentleman....
don't make anything too forward, like an expensive restaurant, because she might not feel that into u, and u'll waste a lot of money
take her at a fun place, where she can feel free to do whatever she wants, not a chique place where u have ta talk in whispers
don't take her to bar or club, she might get drunk
this may sound good to u but she might end the night with another guy instead
if u'v known her for a good while, take her to a place she had mentioned she liked or wished to go, She will kno that u were listening
mayeb a beach restaurant
something ethnic (make sure u kno her allergies)
indian, spanish, french, food
nothing too original like american, (not that its bad or anything but american food is too casual)
...or take her to your place
make ur own meal...something not many guys do
if ur a gent i'm guessing u kno how to cook
make an oven dish, something other then spaghetti
don't make it too formal
instead of champaign, get beer or coke, to loosen her up a bit
don't act like u wanted her to come over coz u wanted to **** her.
when she wants ta leave, let her
i hope i helped
i think u should do the cooking-at-home one...:)
last min tip: no theatre coz the movie might end up bad or too emotional
no concert coz she focuses her attention to the band, not to u or the fact that ur on a date.