For a traditional British dining experience you can’t beat the Goff’s Oak pub (http://www.thegoffsoak.co.uk/). It has crisp and clean contemporary décor and a friendly ambience and serves lovely food at reasonable prices. What better place to take your companion for a beer or two before retreating to the warmth of your own home or hotel to enjoy some après dining fun?
Wikipedia: http://en.wikipedia.org/wiki/Waltham_Cross
TripAdvisor: http://www.tripadvisor.com/Tourism-g3337108-Waltham_Cross_Hertfordshire_England-Vacations.html
Map of Waltham Cross and surrounding areas.
More information about Waltham Cross can be found here.