### Comment:
Are there any underground gambling networks operating in major cities?

### REPLY:
Yes, there are underground gambling networks operating in major cities. These networks often involve illegal casinos, bookmakers, and poker rooms that operate discreetly to avoid law enforcement. They typically require connections or referrals to gain access and provide a range of gambling options for participants. However, it's important to note that engaging in illegal gambling activities is against the law and can result in legal consequences.