The majority of 60yr olds I know wouldn't be seen dead at a Theme Park!
I think you need to broaden your horizons a bit more and widen your social circle. It cant be good for you that the people around you are all so like minded.
I love a theme park, the rides, but amongst other things Ive also -
Gone on a solo whale watching trip to Alaska.
Zipped down the highest zip line in the world when there.
Done an Eco Tour of Borneo
Booked to go to China next year for 3 weeks as a solo traveller.
Learned to Scuba Dive
Taken a friend who was celebrating her 70th birthday to Italy for 3 weeks. She has health problems but it didnt stop her going the the length of Italy on the train just jumping off wherever we fancied it.
Regularly camp in the Desert and sleep under the stars.
Learned to sail.
There's a huge world out there and so many things to do, even on your very own doorstep. Would I rather be dead than try something new? Would I ever want to be the kind of person who proud to say Id rather be dead than do that? No thank you. You're friends have got it covered enough.