The future progressive tense is used when expressing events and action in progress at some future point, however the example sentence cannot be understood in that way.
そろそろお開きにしよかー。
Well, shall we call it a day?
文を書くときには、ふつう大文字で始め、ピリオド(.)、または感嘆符(!)、疑問符(?)、で終わる。
When writing a sentence, generally you start with a capital letter and finish with a period (.), an exclamation mark (!), or a question mark (?).
彼の完ぺきに秩序正しい人生は麻薬中毒の兄弟が現れた時に崩壊した。
His flawlessly ordered life collapsed when his drug-addict brothers appeared.
彼が直向きに生きるその姿は実に健気です。
The single-minded way he gets on with his life is truly admirable.