Most casino hosts are very good at their jobs and are very personable. They work hard to make sure that their guests have a great time and are able to get the most out of their visit.
While it is not required, many guests do choose to tip their hosts.
The amount that is given as a tip is usually based on the level of service that the host provided. If the host went above and beyond to make sure that the guest had a great time, then a larger tip may be given.
On the other hand, if the host did not do anything special or did not provide good service, then a smaller tip may be given.
Overall, tipping casino hosts is completely up to the guest. There is no set amount that must be given, and it is completely up to the individual to decide how much they would like to give.