YOU SAID:

theres a party going on right here

INTO JAPANESE

ここでパーティーが起こっている

BACK INTO ENGLISH

There's a party going on here.

INTO JAPANESE

ここでパーティーが開いています。

BACK INTO ENGLISH

There is a party here.

INTO JAPANESE

ここにパーティーがあります。

BACK INTO ENGLISH

There is a party here.