This is what I have so far, but I'm not very good at writing letters etc
To whom it may concern,
I have noticed that your premises has had a makeover over the last couple of months.
Have you thought about having your website redesigned? A well designed website can increase bookings by as much as 15%.
This is where I'm stuck, I am not a salesman and don't want to sound pushy, anyone done any e-mail marketing? Any help or advice would be good.