I have to say that Downtown Stevenage at chucking-out time on a Saturday night would *not* be my choice for an evening stroll either!
No disrespect to Stevenagians (?) - my in-laws live there.... but the pub opposite the theatre had a, shall we say, certain quality of clientele....
I am reliably informed that the local constabulary had to visit said pub (in force) during the second act of Derren's show....
I heartily recommend it... Keep nagging your folks!

-C