If you have any questions or would like additional information, you should check with your doctor. Americans traveling in France, or any nations belonging to the European Union, are not required to have a visa. It depends on what you are planning to buy in the way of gifts and souvenirs. You do, however, need to set aside a certain amount for lunches, public transportation, and optional excursions. Married couples always room together.
Single people sleep in a double room with someone of the same sex.
If you know someone in the group that you would like to room with, you can make that request, otherwise, travelers are selected to room with one another at the discretion of the tour guide. You may pay a single supplement if you prefer to room alone. This supplement varies depending on the length of the tour. Western Europe has excellent medical facilities and many countries have American hospitals. Check with your own medical insurance, before leaving, to see what they will cover while you are away.