Speak to Felicity (with her blood red accent) at the lobby desk to participate in the daily lottery to win TMs and other rare items. It appears neither hotel section or booking a room are available.
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To the right of the lobby lies the only Casino in West Tandor. When you first arrive, security will stop you, only to give you a free Coin Case before letting you pass. You can play the usual Game Corner games like Roulette and Voltorb Flip to win coins to exchange for rare prizes and Pokémon.
If you ever need a lot of coins, play voltorb flip and use this tool.