If north Indian food works, I can recommend Nirvana (http://www.nirvanatheflavoursofindia.com). It's delicious flavours, great atmosphere for a business meeting, and doesn't have to be overly "exotic" if that would be a turn off. The food out of the tandoor is fantastic (even the mushrooms!).
35 Brunel Rd, Mississauga, ON L4Z3E8, CA