If you are looking for comps....
If you are going to do any volume of sportsbetting, be sure and do it all at one location (this point alone has a cost, since you will not always get the best lines or prices, but if comps are important to you -- then do yor business with just one book).
Be sure and make an introduction at the outset of your trip. Ask to speak with the sportsbook manager or if he is not available, the shift manager.
Explain you are in town and you are staying for X days. You expect to play X games per day and X $ per play. Ask the manager if he will track your wagers and (politely) ask what comps you might be entitled to, if you give all of your action to this particular casino. Explain you are a guest at the casino in the hotel and are staying with them during your entire stay.
I have found that the small books downtown during slow period will comp rooms. If you play $200 a game and up, especially during slow times of the year, you may get a free room and meals. The Las Vegas Club in particualr has a sports theme and has comped rooms to sports gambers (I gave them no table action, but was still comped during one long stint a few Summers ago during baseball season). To make sure the sportsbook manager is on "your side" you might want to buy a $10 ticket on a side and present it to him. The $10 may not seem like much, but small toekn gifts like this move mountains in Las Vegas. I always tip inside poker rooms, often with $5 sports tickets. It gets me preferrential seating and other perks. That may be teaking the system, but that's the way it's done in LV.
If you are only going to be in town for a few days, forget about this and just pay the regular room rate. It's not worth the hassle. But if you are in LV for longer (over a week or more), you can probably get comped, at least downtown. Barbary Coast is also generous to sports gamblers. On the Strip, you can just about forget it. The Northern Strip might be possible to get a comp midweek if you play high, but forget anything like the Bellagio, Mirage, Caesars, etc. People that I know who bet high, have to bet a dime or more per game to get the perks of free room at the high dollar places. And then, their play is tracked very carefully to make sure they are really playing the volume of games to justify comping a $130 a night room. Corporattions are destroying waht was once a great city for gamblers.
-- Nolan Dalla