The Kansas City Municipal Auditorium hosted nine Final Fours (1940-41-42-53-54-55-57-61-64). Old Madison Square Garden hosted seven, Freedom Hall has hosted six, and The Superdome has hosted four.
North Carolina has.
Tyler Hansbrough and Christian Laettner.
New Orleans Superdome is one of them, I believe we have hosted 8 (going on 9) so far. I am guessing but I believe Miami is the other city.
UConn Huskies women
North Carolina has had the most Final Four teams, with UNC going to 18 Final Fours, Duke 15, and NC State 2, for a total of 35 teams.
Uzair naseem hit most fours in cricket