It would really depend on your interests. The world is a very large place! Perhaps you would be interested in low-cost travel groups? Here is an article on how to join a senior travel group www.ehow.com/how_2046604_join-senior-travel-group.html
Yes. Many tours offer a discount for up to one hundred or two hundred dollars depending on the entire cost of the trip, and the age of the senior citizens. Triple A also has some good discounts.
There are some reasonable rates for senior citizens who want to join a senior citizen group. Check out www.takeafuntrip.com/adult-group-tours.aspx. They have reduced rates for senior citizens.
There are plenty of senior group travel tours available for senior citizens. You can go to specialized travel agents who focus exclusively on this market, as online retailers probably do not offer these discounts.
There are many good cell phones for senior citizens. One would be able to find goods phones for senior citizens on websites such as "Consumer Cellular".
Senior citizens can congregate at local parks, senior centers, local establishments such as restaurants or diners, and some even create clubs. Senior citizens often meet with people their own age.
According to the USA Today, Grand European Tours, Elderhostel: Road Scholar and Grand Circle Travel operate some of the more popular senior European tours. You can get more information at the USA Today website: http://traveltips.usatoday.com/senior-tours-europe-18170.html
Senior citizens are realistic. It begins with R.
Many vacation rentals are available that are specially designed for senior citizens. One place that you can visit is www.vacationrentals.com/media/senior-citizen-rentals.htm
There are many great vacation spots which cater to senior citizens. For some examples online you can visit such websites as seniorjournal.com/Travel.htm
Some good exercise titles for senior citizens are: Yoga for Grandparents and Joel Harper's Firming After 50. Many exercise videos for seniors do not involve fat loss, but strength building and flexibility enhancing for the later years.
Some senior citizens become irritable due to dementia and memory loss. Others because they have aches, pains, and chronic illnesses. They also get frustrated with silly actions and questions. If they are senior citizens, are others called junior citizens?
Some good Caribbean tours include boat tours and ecological reserve tours. You can book trips ahead of time through travel websites and travel agencies.