The short answer is: Everybody get comps. At the lowest level, casinos will comp anybody who even looks like they are playing at a slot machine, table game, or a sports book. The comps at this level are free soft drinks in all casinos and free cocktails in some jurisdictions. You don't need to fill out a form or even join a slot club to enjoy these freebies. They are also in addition to any comps you may receive if you are a slot club member. Usually the cocktail waitress will notice you gambling and ask you if you want a drink. If you accept these comps, just remember, the drink is free but, you must tip the waitress for the service. There are two reasons for this. One, if you expect her to come back, you have to make it worth her while. Second, these people work for minimum wage, the bulk of their income comes from tips. Just remember, the comps are free, the service must be compensated by you.