Question: free things to do on your birthday in san diego?
Answer: Applebee's –Receive a free dessert shooter when you sign up online.
Barona Casino – Receive free Birthday offers when you become a Club Barona Member.
Barra Barra Saloon & Restaurant – CINCO-DE-MEEO! ... 
Baskin Robbins Ice Cream –Receive a free scoop of ice cream when you sign up online.