Do you have a client who you really want to impress? 

May I suggest Dinner in the Sky.  According to its website, Dinner in the Sky is a "unique event meant for anyone who wishes to transform an ordinary meal or meeting into a magical moment that will leave a lasting impression on their guests!"  Here is how it works.   Dinner in the Sky suspends a table 50 meters in the sky.   Twenty-two people can sit around the table and three in the middle (your chef or meeting presenter).  The price is about 8,000 pounds, and that does not include the chef or food. 

As for me, I will continue to give my clients chocolate chip cookies.