YOU SAID:

let's go to a party friend

INTO JAPANESE

パーティー友達のところに行きましょう

BACK INTO ENGLISH

Go to your party friends

INTO JAPANESE

パーティーの友達のところに行く

BACK INTO ENGLISH

go to a friend at a party

INTO JAPANESE

友達のパーティーに行く

BACK INTO ENGLISH

go to a friend's party

INTO JAPANESE

友達のパーティーに行く

BACK INTO ENGLISH

go to a friend's party