i think there a good idea, gives the fans a chance to intractive with there hero's. Also, it may give the fighter some joy knowing the fans still remember and appreciate them still, altho that may seem a tad obvious but more applies to lesser known fighters
Its a good night out. You pay £50-£100 for a meal, few drinks, a talk by the boxer(s), chat and a laugh with a few boxing fans. The important thing to remember though is that its not compulsory to attend.
A rent in the space time continuum perhaps :huh I would love to get to a Ray Leonard dinner, even more so if it was with Hearns, Hagler and Duran