Maybe these are just the moments that downtown finally arrives. Party on the Plaza is in full swing. So is its dynamic corner of the central city, with Bayou Place beckoning the masses across the street. And there, on the magnificent grounds that serve as the front entrance to the Wortham Theater Center, are scores of motorcycles at rest in neatly lined rows. The bikers rumble in to party at the plaza, and what better place to park 'em than on off-nights at the Wortham. All the nightlife available isn't going to be enough if downtown can't loosen up a little. On these evenings, it shows off its finest colors: Electra Glides in blue.