YOU SAID:
Jim had waffles today.
INTO JAPANESE
ジムには今日ワッフルがありました。
BACK INTO ENGLISH
The gym had waffles today.
INTO JAPANESE
今日、ジムにはワッフルがありました。
BACK INTO ENGLISH
Today there were waffles in the gym.
INTO JAPANESE
今日はジムにワッフルがありました。
BACK INTO ENGLISH
There was a waffle in the gym today.
INTO JAPANESE
今日はジムでワッフルがありました。
BACK INTO ENGLISH
There was a waffle at the gym today.
INTO JAPANESE
今日はジムでワッフルがありました。
BACK INTO ENGLISH
There was a waffle at the gym today.
That didn't even make that much sense in English.