I visited Café Rouge on Tuesday evening with my two children and my mum, and they could not have been more helpful. Putting up with my extremely disruptive one year old, hastily moving us inside when the heavens opened and giving great service and attention. The only disappointment is that Café Rouge use instant mash rather than fresh, although when I said my eldest didn't like hers, it was quickly replaced with fries, which obviously went down well. The staff were all very friendly and although we don't go often as we're not from Liverpool this was our second visit and we'd go again.
The only downside is that the service is never particularly fast at any Café Rouge, and this is fine for a couple but not with children who get bored waiting for their food. It does have a lovely location though and they do provide colouring for children, and you can eat inside or outside.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.