THE DAILY NUMBERS 15,000 - number of ticket-holders at Friday night's Pearl Jam concert at the Tweeter Center in Mansfield

11 - the Tweeter's nightly curfew

30 - minutes Eddie Vedder et al played past curfew

50 - cents violators are fined per fan for first 30 minutes past curfew

7,500 - Pearl Jam's fine,

in dollars

It delighted their fans, of course, but Pearl Jam's 3 1/2-hour show didn't go over too well with Tweeter Center management. General manager Bruce Montgomery fined the band $7,500 for violating the town-imposed curfew of 11 p.m. "It's important for us to maintain good relations with our neighbors," he said. Ironically, the grunge-rockers had given neighbors 250 tickets to Friday's show. It seems unlikely the band will play the Tweeter Center anytime soon. At one point during the concert, Montgomery and the band's manager, Kelly Curtis, could be seen arguing backstage. Afterward the band was denied the usual police escort and was told to find its own way out