Enthusiasm bubbled like fresh champagne last week when 7,815 gathered in the Greensboro ( N.C.) Coliseum for the finals of the 21st annual tournament of the Central Intercollegiate Athletic Association, a sprawling 18-team conference of Negro schools from four states and the District of Columbia. This is one tournament pro scouts attend en masse, looking for another Sam Jones or Al Attles, both discovered there. The prize was a spot in the NCAA college-division playoffs and the top-seeded favorite was Norfolk State, a run-and-gun team which had won the regular-season championship and averaged 103.3 points a game. Coach Ernie Fears's theory is that "something has to happen every seven seconds." He says, "We run and we like a lot of points. It gets more people in the act." The best part of the Norfolk act is 6-foot-5 Pop Pitts, a burly 240-pounder who attacks the boards viciously and tramples everyone in sight to get to the basket. Pitts scored 34 points as the Spartans clobbered Maryland State 125-100 and 31 in a 116-90 win over Delaware State to put Norfolk into the final against Winston-Salem State (19-4). The pride of the Rams was Earl Monroe, a slim, 6-foot-2 junior backcourt man from Philadelphia who already has the pros drooling. He had scored 67 points while Winston-Salem was beating J. C. Smith 96-86 and Howard 85-84 in overtime. But Coach Clarence (Bighouse) Gaines knew he had to stop Norfolk's runners. So his men played ball control and they cut off the Spartans' fast break by matching Pitts in rebounds. Still, Norfolk led 55-50 early in the first half. Then Monroe, whirling in jump shots and layups (right), took the Rams on a 19-4 spree that killed off the Spartans. Monroe finished with 42 points and Winston-Salem won 87-80. "That Earl," said Bighouse admiringly, "he just can't stand to lose."