You could stick around Denver for fireworks tonight, but if you go to Black Hawk, you'll get a noteworthy spectacular as well as a sweet post-show scene. To see the display (more than 7,000 firecrackers), snag a seat near Stroehle Square. Afterward, drop into a casino: As of Thursday, gambling in Black Hawk went big, with increased betting limits, new games like craps and roulette, and around-the-clock hours. Sat, July 4. 8:30 p.m. Free. Black Hawk, Gregory and Main streets