In Soho's O Bar in Brewer Street drinkers were being offered four-pint jugs of cocktails at £8, compared with the normal £15, between 4pm and 8pm. And in Zoo Bar in Leicester Square, drinkers were being tempted by £2.50 kamikaze shooters - normally £3.95 - and chardonnay, down from £12.50 to £6.50 until 7pm.