Possible Clues:

• Wagerers' site (Abbr.)
• Handicapper's hangout, for short
• Place to put down stakes?: Abbr
• Gambling initials
• One way to wager on horses: abbr.
• Bookie alternative in N.Y
• Horseplayer's hangout, for short
• N.Y.C. betting setting
• Wagering letters
• Gambling letters