Can you sugggest me good innovative ideas for family party before my marriage?

Desert and story party.

Everyone brings their favorite desert to share. Every brings and tells their favorite family stories, 1 story about the bride or groom, and one family story involving anyone in the family. Eat desert, tell the stories, video tape it and you'll have something to cherish and look back on. An heirloom of stories told by your relatives to your kids.

cocktail party would be nice. but more casual as it is with your family. you know it would be nice if we create a powerpoint presentation including family pictures that would summarize of what and how your family live together as a happy family. and have a special tribute to your parents. it would be touching. they will appreciate that. and give a special message to your siblings and parents. you can also give them little presence that would best describe their character. simple but sweet. good luck to you.

I don't what are you thinking about it? But I think your friends have already done the four you have mentioned then your turn should be just a tea party or combined party from two of them. If you wish surprise your friends you will invite your friends but not arrange a party.