The runninâ and hoppinâ and leppinâ â and, if youâre Irish, the punchinâ too â will doubtless hog the headlines in London for the next couple of weeks (with the old dopinâ likely to get a bit of a showing too) but, with 26 sports on offer at the Olympic Games, the unfamiliar, the esoteric and the borderline weird will also get their place in the sun and rain.