In short: money off shit.
A Snapfax consists of two credit card sized slim magnets, which are used to hold a concertina of paper, upon which is printed a wide variety of discounts for local establishments.
There's a different one for each city, with different companies in each one. The Glasgow edition has offers for restaurants - big chains as well as local places - it's got Burger King and Los Borrachos in there, drinking establishments - with many 2-for-1 offers on selected nights, free or discounted entry to clubs, and money off at clothes shops, electronics places, even kilt hire - pretty much everything, really.
Snapfaxes are distributed free to students at the start of the university term, and are also available for free from their website at www.snapfax.co.uk, or by sending a cheque for £3 to their office in Edinburgh.
They're available for the following cities:
Aberdeen - Bristol - Birmingham - Brighton - Cardiff - Dundee / St. Andrews - Edinburgh - Glasgow - Liverpool - Leeds - Manchester - Newcastle - Nottingham - Oxford - Paisley - Sheffield
Just one thing to bear in mind: Don't keep it in your wallet! Magnets plus credit cards equals blank credit card!