Since there are too many people who must want to give their loved ones a party, they are going to scan for the book for 50th party ideas to give them insights as how to make the party fit for the celebrant. The theme should be something that the celebrant can relate and approve. If it is going to be a surprise party, it must not be made with great care and attention to details in order to prove the intention of the event.
If the people organizing for the party are young, do always take into consideration the older guests.