When the International Olympic Committee convenes in Copenhagen next Friday to announce its selection of the host city for the 2016 summer games, anyone walking in the proximity of Madison's Concourse Hotel is going to hear either quite an outburst of cheering or a cascade of groans. If Chicago gets the bid, it will be the former. But if one of its rivals -- Madrid, Rio de Janeiro or Tokyo -- gets the nod, expect the pall of a big letdown to settle on Madison.