Is station wating room open all night.

Yes

These are the timings for stations waiting room : MONDAY 12:00 AM - 5:30 AM 10:15 PM - 11:59 PM TUESDAY 12:00 AM - 5:30 AM 10:15 PM - 11:59 PM WEDNESDAY 12:00 AM - 5:30 AM 10:15 PM - 11:59 PM THURSDAY 12:00 AM - 5:30 AM 10:15 PM - 11:59 PM FRIDAY 12:00 AM - 5:30 AM 10:15 PM - 11:59 PM SATURDAY 12:00 AM - 5:30 AM 10:15 PM - 11:59 PM SUNDAY 12:00 AM - 5:30 AM 10:15 PM - 11:59 PM