Have visitors in Paris? Here are some ideas:
Lay out or picnic with a friend (or a group) on Champ de Mars, the long, formal garden between the Tour Eiffel and Ecole Militaire. The view of the Tour Eiffel from here is just fine.
Visit the Musée de la Chasse et de la Nature (Museum of Hunting and Nature) for an array of taxidermy, organized in the many rooms of the Hôtel de Guénégaud. 62 rue des Archives.
Have a Leffe or two at Café Hugo at Place des Vosges. Wi-Fi too. 22 Place des Vosges.