My sister has another one to add:

The fact that there are a few empty tables in the restaurant does NOT mean you get to be seated immediately. Those tables are empty because our servers are already stretched too thin and nobody is serving them. Whining at the hostess is not going to make the management staff more servers, nor is it going to make anyone happy. Just RELAX for 15 minutes so that you can have a server who is a)not completely frazzled and b) has the time to get to you between all of their other tables.