These are song lyrics from https://katamari.fandom.com/wiki/Lonely_Rolling_Star
The full line is 来月またあの場所で待ち合わせしようか which I understand as meaning “Next month shall we meet in that place again?” But I can’t for the life of me understand why exactly that’s what it means.
In particular, I’m confused by 待ち合わせしよう which just seems like two nouns in a row, with no verb in this sentence. Is しよう the verb here? Looking it up on jisho wasn’t really helpful.