Generally, if you travel with a group and six people go together, how will the room be arranged? Because there are three couples, can we arrange three rooms?

Yes, you can tell the travel agency the situation first and make your thoughts clear, so that they will consider it as appropriate, and even if it is impossible, they will try their best to make reasonable arrangements. Because there may not be as many as three double rooms, but there are three rooms, so it should be three women in one room, three men in one room, or other circumstances, so don't be embarrassed or even in the mood to play.