Well it isn't a rewards card program each time you visit a prostitute, 10 jobs and the 11th is free... However google is your friend. https://www.eroscard.co.uk/
Im pretty sure they have a similar scheme in operation in Hull (pronounced 'ull if your actually from Hull)
You've clearly never been to 'ull. I once went to an Oasis warm up before the Heathen Chemistry tour up in 'ull. After the gig we went into town, via a short cut recomended by a friend who was a uni student there, we were approached by a dirty, scabby lipped, middle aged lady who offered us £5 bj's. We gracefully declined at which point she offered us 2 for a fiver. We strongly declined and departed rapidly.
You needn't have told us where this took place - it was obvious you'd been to Hull and back :110: heh, sorry!
Who said i came back? 2 for £5! "Its a deal, its a steal, its the sale of the fuckin' centuary... in fact fuck it, i think i'll keep 'em."