One fun thing for people to do on their 35th birthday is to have a karaoke party with family and friends. Karaoke machines can be rented at various electronic or music stores.
A karaoke party allows people to visit with others while having a good time. The person can also serve snacks or drinks.
A romantic dinner with a spouse or partner is also a fun idea for a birthday party. This allows the birthday person to spend quality time with the one they love. To take it up a notch, the couple can visit the place where they had their first date.