Then, they operated as a sweepstakes parlor until Junewhen those activities were also shut down via court order. Charitable or House-Based Gambling.casino caddo mills WALDORF ASTORIA EL SAN JUAN HOTEL & CASINO Gambling in Texas is severely restricted—unless you count the bingo offered by charitable organizations—with only 2 casinos, and a handful of racing tracks. As such, there are no legal online slots that gamblers can play in Texas. We've left the orginal article in tact below the new information. Legal Online Gambling in Texas. Texas has not had many major changes in its gambling laws in the past few years. Most forms of land-based gambling are illegal. Texas Legal Online Gambling Guide Fortunately viable, legal and legitimate options still remain for Texas players who are interested in participating in legally sanctioned online gambling entertainment.