There was an event nearby, so work was really busy since there were a lot of people
例えば、
A: How was your weekend?
週末はどうだった？
B: There was an event nearby, so work was really busy since there were a lot of people
(バイト先に)近くでイベントがあったから、人が多くて忙しかった
個人の好みですが、私だったら、
There were a lot of people around where I work because there was an event nearby, so work was really busy.
直訳：近くでイベントがあったからバイト先の周りに人が多くて、バイトが忙しかった
と言います。
ご参考になれば幸いです。
アメリカ合衆国 
