I'm often asked why several states like California and Arizona do not allow roulette. Actually they do, but not the traditional style you are thinking of. Roulette has always been a stylish and regal game, unlike craps, which is a more tough and aggressive game. However, neither game is allowed in California, and there's a good reason. Get what you can!
Washington business persons did the same thing as other states when the card rooms lobbied the state to allow "other" card games. Like Arizona and California, they figured it would be much easier to say, "Well, the state already allows poker. It's a card game. We just want a few other card games like blackjack." And that's how the measures were voted on, either by the legislators or the populace. They voted for card games, not really casinos. So, no roulette or craps.
However, to get around the laws, some casinos in California offer a kind of roulette and craps which includes the use of playing cards (yeah, silly, I know). It's not the same, but it's not that different. Personally, I won't play it. However, you can play slots that are legal and pretty darn close to the real thing. If you love craps, you'll miss throwing the dice, making call bets at the last second, and harassing the dealers. You also won't hear chatter from the dealers like, "Niner, niner, boxman's a whiner." But some of the video terminals for these games are attached to plexiglass bubbles where dice do bounce around and give a feel for the game.
As for roulette, many companies now offer roulette machines that incorporate an actual wheel. You make your bets on the video screen, the wheel spins, the ball is spun the opposite direction and you can still watch it land right next to the number you were betting on (no, it's not rigged, just like real roulette). It's as close as you can get to the real thing.
Unfortunately, not every casino is going to have the games you want. Many Nevada casinos have only slots these days because table games are much more expensive to manage. Even one of Harrah's Reno casinos had no table games in the 1960's.