Dinner with Colleagues

Last night, after work, our school had a dinner party to reward our efforts for Sports Day and Open Day.
There were about thirty colleagues in the party.
We gathered at a restaurant which is located in the city center at 6:30 p.m. 
The event started with the principal giving a speech of appreciation.
Then we ate dinner and chat.
The dishes were very good with fish and vegetables.
I personally didn't like to join a second party, so I quickly left the restaurant and went to a gym for a workout.
Afterwards I was so tired that I wanted to take enough rest for the coming week.