Answer

Here are some options you can check for a family stay with AC rooms near Dadar, Mumbai:

• Jain Dharamshala, Aadeshwar Temple, Mahim West
  Near Dadar area, around Mahim West. Reports mention AC rooms and Derasar nearby. This may be a good Jain option for family stay.
• Shree Kshetrapal Jain Atithi Bhavan, Chira Bazar / Thakurdwar
  Not exactly Dadar, but in South Mumbai. It offers AC rooms and family-friendly accommodation. Suitable if you are okay staying a bit away from Dadar.
• Sheth Motisha Jain Dharamshala, Bhuleshwar
  Traditional Jain dharamshala in Mumbai. AC and non-AC rooms are mentioned. It is also not in Dadar, but can be considered if Dadar options are full.
• Shri Shantinath / Adeshwar Jain Dharamshala near Dadar Kabutar Khana
  This is close to Dadar, but you should personally confirm room condition and whether AC rooms are available, as reviews are mixed.

Practical Suggestion

For a family, I would suggest checking in this order:

1. Mahim Aadeshwar Jain Dharamshala — closest Jain option near Dadar/Mahim.
2. Dadar Kabutar Khana Jain Dharamshala — very close, but confirm AC and cleanliness before booking.
3. Kshetrapal Jain Atithi Bhavan — better if comfort and AC room matter more than exact Dadar location.
4. Motisha Jain Dharamshala, Bhuleshwar — useful backup option.

Before Booking, Please Confirm

• AC room availability
• Attached bathroom
• Family room size
• Check-in/check-out time
• Whether Jain food / bhojanshala is available
• ID requirements and whether advance booking is needed

Takeaway

If you want to stay closest to Dadar, check Mahim Aadeshwar Jain Dharamshala or the Jain Dharamshala near Dadar Kabutar Khana first. If comfort and AC room quality are more important, Kshetrapal Jain Atithi Bhavan may be a better family option.