5 Things You Need to Know Today: Late Night Q and 2 Train Troubles, Open Mic, Big Band Music, More

1. You need a night out. Head to the  for .  If you want to perform, get there by 6:30pm to sign up. The show starts at 7 p.m. No cover. 227 4th Ave. at President Street.

2. You need big band music. Head to , 837 Union St. at 7th Ave, to hear jazz and classical trombonist JC Sanfordand his his large ensemble for a big band concert at the Tea Lounge. 9 p.m. - 11:30 p.m. No cover.

3. You need to mingle with other civic minded Brooklynites ... plus free drinks never hurt. Tonight's your night because the civic magazine City Limits, is having a release party and mixer for it's "Defining Brooklyn," issue. There will be free wine, cocktails, and food and entertainment. Go to citylimits.org/party to RSVP. 7 p.m. - 9 p.m. 1368 Fulton St., at Marcy Avenue in Bed-Stuy.

4. You need to get the kids out of the house. Today's a good day to hit the Central Library, where there is , where kids 0-5 years old play with toys and listen to stories. , Youth Wing, 10 a.m. In the afternoon there's  from 4-5 p.m. for kids 3-5 years old. Both events are free. Or see our full list of .

5. You need to know if your train is running, and if you have to move your car. Taking the train between midnight and 5 a.m. is going to be unpleasant on both the 2 and the Q train tonight. Between midnight and 5 a.m. weekdays through April 15, the Q train is going to drop you at the N platform at Pacific, make you walk to the Q platform at Atlantic, then have you wait up to 30 minutes to catch the connecting train. The MTA is doing the same thing with the No. 2 train tonight and tomorrow night (or technically Tuesday and Wednesday mornings), with the change taking place at Chambers Street, according to the MTA.