There is always the possibility of slots being open.

General Registration details can be found here and you can view availabilities by signing into your player profile.

BROOKLYN LEAGUES: View Schedules
* 5-a-side Indoor in Park Slope: Tues. & Thurs.
* 5-a-side Indoor in Williamsburg: Mon-Fri; Sun.
* 7-a-side Outdoor in Williamsburg: Thurs. & Fri.

MANHATTAN LEAGUES: View Schedules
* 5-a-side Indoor in Chelsea: Tues. & Fri.
* 5-a-side Indoor in Murray Hill: Tues., Sat. & Sun.
* 5-a-side Indoor on Roosevelt Island: Sun
* 6-a-side Outdoor in Chelsea: Thurs. & Fri.