Is there a bar or restaurant where you can get a drink and snack?
There is not bar or resturant however there is one cafe /bar around the corner and merely 2 minute from nice mall
Yes you can do it there !
Yes, It's very easy just walking to Underground station Ber Hakim where you will find many of them and can have all you wish
Restaurants and bars are withing walking distance from the Hotel. Bakery and pastry shops are nearby as well.
Get an answer from Adagio Paris Tour Eiffel staff and past guests.