I am not too familiar with all the San Diego rooms but north of there
in Riverside is Shooters . I believe thier tournament room would offer a great place to hold a school whether its one day or longer.
It has 8 tables and is seperate from the main room which would give
a little privacy. There are also mini bleachers and other tables to sit at and plenty of room.
Like Dan I would probably be interested in attending if the the space is open.
Good luck and hopefully you will find a suitable place.