How do you keep a 40th Birthday Party a surprise

How do you keep a 40th Birthday Party a surprise

Everyone had a fantastic time! I was being sent snap chats all night and I have never seen all of them smile so much!!! It really brought out their primal instincts! Thank you for exceeding my expectations; you followed through with everything you said you would do and you made my visions in my head translate to reality for my girlfriends birthday celebration!