Choi means a little and Nomi means drink alcohol. This Choi-Nomi festival is held in Yokosuka on April 6th, 7th and 8th.
You purchase the ticket (2,400 yen in advance / 2,500 yen on the day) and you can try one drink and one food at 3 different restaurant (more like Izakaya) in Yokosuka. 74 restaurants in Yokosuka join this festival.
For more information, please ask Liberty Cove House Concierge desk.