Things to do at night in Paris

Eiffel Tower - go up while it's still daylight and watch the city turn into the City of Lights - magical.

Seine River cruise (without dinner) to see everything lit up at night.

Your guide may have some suggestions or you may decide to do something with other group members. If I am not mistaken you will get a ticket for a Seine boat tour so don't book anything ahead.

This is a fun tour! I hope you enjoy it as much as I did!

Watch the sunset from the Trocadero viewing the Eiffel Tower, then wait for the first twinking lights from the tower on the hour.

I also recommend a Seine cruise at sunset. Seeing Notre Dame lit up is also fabulous. Enjoy Paris.

Hi Ken, how about a concert at St. Chapelle?

https://www.classictic.com/en/sitesearch/?search=st+chapelle%2C+paris&from_day=15&from_month=2016-05&until_day=15&until_month=2017-05

I also enjoy a boat ride on the Seine and walking over to the Eiffel Tower to see it illuminated.

Paris is a beautiful city, especially at night!

If you like to sing, this Parisian cafe sing a long is fun (food isn't bad either although it is not the draw).
https://janettravels.wordpress.com/2011/10/09/le-vieux-belleville-non-je-ne-regrette-rien/

We like to walk in Paris at night -- I personally find it more lovely than riding the boat down in the ditch. Walking round Notre Dame is stunning. A stroll up the Champs Elysees with a turn across Pont Alexandre at the top of the hour for the Eiffel Tower's sparkle is wonderful. The view of the Eiffel Tower from Trocadero is awesome.

Another great night view is from the top of the Arc de Triomphe. If it is a nice night, get there before sunset (8:30-9 pm or so-got to climb the stairs up & there usually is a line for tickets) and watch the sun go down and the city lights up below you. Great view of the Tour Eiffel as it lights. The Arc is open until 11 pm with the last tickets sold at 10:30 pm.

Wonderful ideas - glad I checked in on these postings! We will be in Paris next month at this time.