martini night.

Hello!
I have a conversation:
Woman: Hello, Bill. How was the lucheon yesterday?
Man: I wasn't able to go. But we are looking at going out tonight after work. Would you care to join?
Woman: That would be great. Is it martini night at the new restaurant again?
Man: yes, it is.

what does "martini night" mean?
thank you in advance!!

Sounds like a night when martinis are the featured drink – either a variety of different kinds, or special prices, or both.