Irish Pub featuring live music. Lily Flanagan’s proudly serving the community since 1987. Lily Flanagan’s was the original Irish pub located on the south shore of long island. Lily Flanagan’s is a staple in the Irish community, whether it’s a night out with friends, or letting us host a catering event for your private party. We offer different specials every night of the week. And live entertainment on the weekends. We offer daily specials every day of the week. Flannagan’s of Islip can provide the atmosphere, entertainment and welcoming staff that will make your experience unforgettable.