The focal point of stage entertainment in the town is Castle Hall in The Wash. As well as local drama there is a programme of events, featuring Children's shows, tribute acts, dance and music. Visit the website below to see what events are on.
The Hertford Tourist Information Centre can be found at 10 Market Place is the centre of town. They have friendly staff plus loads of information and maps on Hertford, the local area, London and further afield. I've included a map of the sights to visit plus a link to the excellent Discover Hertford website which is full of information.
Tourist centre is open Mon-Sat 9:30am-5pm.
Small as Hertford is, it still has around a couple of dozen pubs and bars. Details of all of them can be found on the website below.