Well its odd that in this day and time, particular...

Well its odd that in this day and time, particularly with an offer of a prepaid deposit, that a "professionally ran restaurant" doesn't accept reservations - for a group of 15 mind you.
Although things became much clearly after I was rudely informed that "exceptions never happen". I asked to speak to the General Manager (who sounded 18). He stated his name was Nick and after I explained my situation and asked for a reservation, was promptly dismissed because he's "been the GM for 14 years and it [reservations] never happen."
Without a lecture on good customer service (forget expecting great customer service), this restaurant has lost my business, 14 other folks business, and hopefully a few more after reading this review. In addition to this review, I'm adding one on Yelp and Google and telling anyone who will listen...
Remember, Nick, Mr 14-year-GM, that customers pay your paycheck. I wonder if Lisa, the owner would tolerate such unprofessional and rude behavior if she were aware? I guess she will if enough people suffer your kind of restaurant management.