Play the bank of machines called FLUSH ATTACK at the Riverside(worth $25-30+ an hour on paper) only in the Flush Attack mode. Play one coin very, very slowly until the mode light comes on then play to hit the flush. This can found in a few other places, but the Riverside is the best, possibly in the entire country.
For sportsbetting, head to the Golden Nugget which uses the same lines as the casino in Vegas. You can find good numbers at the other joints but their limits are ridiculously low.
For dining, try the gourmet room at the Pioneer, the buffet at Harrahs, and the waterfall restaruant at the Golden Nugget near the lobby.
For fun, rent a jet ski and tour the colorado river.
Not sure if they offer it anymore, but the shopping mall across from the Edgewater use to have BLACKJACK MATCHPLAYS at the information center if you ask, which if you get 3-5 times per day is worth an automatic $30 in your pocket.........only use one at a time at the casino every 3-4 hours as they are limited to one per day by the casinos.
Hope this helps,
-FH-