There are a lot of places that you can find travel groups with. One place that you can visit to check out more is at http://seniortravel.about.com/od/tourgroups/Senior_Travel_Tour_Groups.htm
TO find cheap senior travel tours groups, you first need to determine where you want to go. AARP is an organization for seniors. They can help you out.
There are definitely European tour groups for seniors. The best resource for help in this area is you local travel agent, who will be able to help you choose the vacation tour that best meets you wishes and budget.
Senior Tour Groups are tour groups designed for seniors and the elderly who wish to see more of the world in their Golden Years. There are websites that provide lists of the various groups and the locales they visit online.
Most Senior Travel/Tour Groups state they are for Seniors ages 50 and up. Such sites include www.50plusexpeditions.com and www.eldertreks.com. These websites specifically advertise to populations with in this age group.
There are lots of places that have details on this but the most worthy one I found was http://seniortravel.about.com/od/tourgroups/tp/Tour-Groups-for-Seniors.htm
There are many tour groups across Europe which cater to seniors. You can find some examples online at www.reidsguides.com/t_tu/t_tu_seniors.html and www.getours.com/
There are a couple of options for single senior vacations. You could travel alone or you could get involved in some tour groups that cater to senior's. A good place to start your research is http://seniortravel.about.com/
http://www.getours.com/ is a good site to find European tours for seniors. All information is provided at that site to ensure a safe and enjoyable trip.
There are a few bus companies that offer tours that caters to seniors. You can check with your local travel agent for information. Here are also a couple of websites of bus companies that cater to seniors: www.travellandmark.com and /www.monseybus.com/
There are many bus tours across the globe which cater to seniors. You can find information online at such websites as www.travellandmark.com/seniorAdults.asp
there are many places that you can find that have tours for senior groups but here is a website that is a really good website that shows the best senior tour groups online. here it is. http://www.transitionsabroad.com/listings/travel/senior/KeyWebSites.shtml
If your grandmother and her friends are wanting to take a trip you can contact a local travel agency for tours for seniors. If she or any of her friends belong to the AARP, you can contact them for suggestions.