I am an experienced club hostess and ex club manager. I have written a host/hostess training pack that you can purchase for 50L at http://slurl.com/secondlife/Quargar/59/149/45
Topics covered are:
Finding hosting work
Interacting with guests
Getting tips
Using radars, HUDS and gestures
Attracting a crowd and why you should
Appearance and presentation of your avatar
Interacting with your fellow staff members
Don't spend hundreds of lindens on hosting classes when you can learn the trade for just 50L.