Dress code for dinner at the Eiffel Tower

My dad went two or three years ago , with his cousin her hubby and a friend , all locals .

No suit required
And as far as I know no tie either .

He wore his khaki zip off pants and a nice windbreaker ( sort of like one might have golfing not a hiking windbreaker ) with a proper button up shirt , it's what he had as he didn't know they were going . His friends wore sports jackets

How old are the kids ? No one expects a young child to wear a suit but they will not allow shorts or runners or tshirts .
A pair of long pants , a shirt with a collar , and shoes .

Ps the dress codes are on the websites you know .
Some folks will tell you that you should have a tie but you do not have to they just wish everyone would still dress formal as it makes them feel special , reality is in most even nicer restaurants in Paris the tie and suit are in the minority.

Dress smart casual or business casual , as a lady you can wear a nice pair of slacks and a top and throw on a nice necklace and decent shoes to dress up . I always wear dresses so no issue for me .

My son is 17 and my daughter 22. It will be my 70th b'day.

When I have this sort of question I google pictures and look at the people and try to discern the norm. Yup, if its not required, but if will make those around me feel "special" then I do that for them.

I googled "58 Tour Eiffel" and mostly what I saw was what the English might call "smart casual" and what we might call "business casual" to sports coats (mostly without ties) at what looked to be lunch. At dinner it looked to be sports coats (mostly with ties) to suits and ties

Then I googled "Le Jules Verne" and it was a step above what is saw at "58 Tour Eiffel". Actually saw a few that truly bordered on formal.

Now some might argue that some of the photos are marketing photos, well, that sort of says what they want the image of the place to be.

As for schlepping a suit. I'm not a fan of it either. We mostly travel with carryon luggage so years ago I went out and purchased one of those impossible to wrinkle navy blazers, wrinkle proof slacks and a wrinkle resistant shirt. As long as I don't think i will need the tie the shirt is a silk "T" or a silk Polo so its fine around town during the day too. I most often wear the blazer on the flight. All the pockets make it an ideal "travel vest". The nice trousers and shirt open up a lot of possibilities in the evenings where ever we go and I realize that looking a little better gets me better tables and better service.