Novus Ordo Seclorum who runs the Cthulhu Master Tournament and other great Call of Cthulhu rounds since 1985 just listed these new events.  Plenty of tickets available as each is multiple tables.  Our initial events sold out the first day of pre-reg, so please sign up for these if interested:
RPG16100968 NOS Cthulhu Classics
RPG16100974 NOS Cthulhu Classics
RPG16100964 Gotham City Nights