If your play warrants it, a host will find you. Even for low end places, they're looking for $100+++ a hand at the tables (A LOT more than that at nice joints) or a big amount of coin in at the slots.

Getting assigned a casino host depends on your "theoretical loss" (Theo) rather than just the raw amount of money you bring to the table. Most mid-tier casinos look for players who wager enough to generate several hundred dollars in theoretical house edge per day. For slot players, this usually means a daily "coin-in" of $5,000 to $10,000. For table games, it typically requires an average bet of $50 to $100 per hand for at least four hours of play. In high-end Las Vegas resorts, these thresholds are significantly higher, often requiring a $250+ average bet. A host's job is to build relationships with "high-value" guests, so consistency is key; a one-time big bet is less likely to land you a host than being a "steady" player over several trips. Once you reach these levels of play, a host will often approach you on the floor, or you can visit the VIP services desk to request a review of your recent play history for host assignment.