My company was approached a while ago by a hotel chain and we were offered a discount of 10% when any employee stays at one of their hotels. It doesn't cost us anything; it's mutually beneficial for both us and the hotel. They are simply trying to give us incentives to stay there as opposed to one of their competitors. They only require that we show an employee ID when we check in. Business or pleasure trips... doesn't matter. We made that clear at the outset because we don't want any liability if an employee does damage, etc. while on vacation. So, there is no liability issue. It's simply a discount just like an auto club or senior citizen discount.
When our employees are on vacation, they sometimes use this discount--and so do I. We've been taking advantage of this for years.
I was wondering, in light of this other question, should I require my employees to ask for permission from our HR department before they take advantage of this discount when they are on non-business related travel? And should I ever reject their request?