Solid tabletops usually have a very square corner. If you have little kids or the circulation is tight allow extra space at the ends so it’s easier to get around the corners without hitting your shins. Go for color with an upholstered coffee table as it will draw people to the surrounding sofas and chairs. Top it with a tray to hold books and other items (and to soften a strong color such as the pink).
When you have two sofas or any larger seating arrangement a big coffee table might seem like the obvious solution. But also consider a pair of matching coffee tables. They will keep the focus off one large piece of furniture and let your eye move around the room more easily. One classic coffee table size is 48 by 24 inches so you can plan on that when thinking about your furniture arrangement. A large coffee table is often double that: 48 inches square.