Try at Hudson Lane and Punjabi Bagh. They have offers going on that includes food and alcohol both. Like Library and with good ambiance you can go to Level Up.
I have some suggestions for you, where you can find some cheap beer(for around ₹200):
1. My bar cafe, greater Kailash
2. Cafe MRP, CP
3. Scooter on the wall, SDA Market
4. Match Box, HKV