If people were not allowed to drink in Japan it would reduce the opportunities people have to communicate with one another outside of work.
If alcohol were to be banned in Japan co-workers would have one less chance to socialize with one another outside the workplace.
If people were not allowed to drink in Japan it would reduce the opportunities people have to communicate with one another outside of work.
「もし日本で飲酒が[許可](https://eikaiwa.dmm.com/uknow/questions/32007/)されていないかったら、職場外で人々がお互いにコミュニケーションを取る[機会](https://eikaiwa.dmm.com/uknow/questions/32095/)が減るだろう。」
reduce 「減らす」
opportunities「機会」
reduce the opportunities 「機会が減る」
If alcohol were to be banned in Japan co-workers would have one less chance to socialize with one another outside the workplace.
「もし日本でアルコールが禁止されていたら、職場外で同僚と交流する機会が１つ減るだろう。」
have one less chance to socialize で「交流する機会が一つ減る」
ご参考になれば幸いです！
I think the amount of opportunities to communicate with colleagues and managers outside of work would decrease if alcohol was banned in Japan.
これはもう一つの言い方として使えると思います。
もし if
アルコール alcohol
禁止されたら banned
上司や同僚 colleagues and managers
仕事以外のことで outside of work
コミュニケーションする communicate
[機会](https://eikaiwa.dmm.com/uknow/questions/32095/) opportunities
[減る](https://eikaiwa.dmm.com/uknow/questions/54989/) decrease
思う I think
参考になれば幸いです。
日本 
オーストラリア 
アメリカ合衆国 
