Complex sentence: Long-time fans should note that the'Beer Garden' at 51st Street at 9th Avenue has closed and reopened on 9th avenue between 50th and 51st streets.
Split into simpler sentences: Long-time fans should note that the'Beer Garden' at 51st Street at 9th Avenue has closed. However, they have recently reopened on 9th avenue between 50th and 51st streets.