A night of revelry should not be dependent on how much bank balance you have left. But we live in real world and money has put up all sorts of regulations.
But there is a place perfect for what whatever money you have left, and here is a comprehensive list to help you:
For 'salary agayiiiii' Celebration
The phone beeps and that message from bank instantly picks your spirits to twice as Uncle Scrooge's here.

For such over zealous expectations from your salary, there are places you can happily drown your money in.
Zoobar

Where: 1st Floor, Liberty Lodge, DJ Road, Above Mcdonalds, Vile Parle West, Mumbai
Cost for two: Rs 2,000
Rate of a pint: Rs 215 (approx)
Rumours Lounge

Where: A S Marg, Near Marine Shipping Corporation, Opposite Powai Lake, Powai, Mumbai
Cost for two: Rs 1,800
Rate of a pint: Rs 200 (approx)
Rude Lounge

Where: 8th Floor, B Wing, Supreme Business Park, Hiranandani Gardens, Powai, Mumbai
Cost for two: Rs 1,800
Rate of a pint: Rs 200 (approx); Happy hours from 11:30am to 07:00pm (All days of the week)
Doolally Taproom

Where: C18-21, Dalia Industrial Estate,Near Fun Republic, Off New Link Road, Andheri West, Mumbai
Cost for two: Rs 1,800
Rate of a pint: Rs 250 (approx)
Cafe Terra

Where: Executive Enclave Hotel, Seventh Floor, Pali Hill, Bandra West
Cost for two: Rs 1,800
Rate of a pint: Rs 250 (approx)
For 'bus 15 din aur' Joy
The expectations you have from the middle-class obsessive saver in you have been acutely different from the reality. Half the month is gone, and though you are not broke, you aren't Uncle Scrooge either.

The need for a night out with friends continues and you can still afford the non-shady.
BlueFROG

Where: D/2 Mathuradas Mills Compound, NM Joshi Marg, India, Lower Parel, Mumbai
Cost for two: Rs 1,000
Rate of a pint: Rs 300 (approx); Happy Hours from 6:00 PM to 9:00 PM (Tue - Sun)
The Bar Stock Exchange

Where: 89, Shivani Industrial Estate, Opposite Times Square, Sakinaka, Mumbai
Cost for two: Rs 1,000 (without alcohol)
Rate of a pint: Varies on demand.
Yellow Bar All Day

Where: 21st Road, Next To Gauri Khan Store, Khar West, Khar, Mumbai
Cost for two: Rs 1,500 (without alcohol)
Rate of a pint: Rs 220 (approx)
Pop Tate's

Where: 17, 3rd Floor, R Mall, LBS Marg, Mulund West, Mumbai
Cost for two: Rs 1,600
Rate of a pint: Rs 130 (approx)
Khar Social

Where: Rohan Plaza, 5th Road, S.V. Road, Khar West, Khar, Mumbai
Cost for two: Rs 1,000 (without alcohol)
Rate of a pint: Rs 100 (approx)
For '500 mein hojayega?' Last Week
Who are we kidding now! You probably are left with something close to four-digits in your account but the best way to beat 'urban poor'-blues is to drink it up with great food.

And lucky for you, Mumbai has a high amount of cheap bars that don't look like dance bars.
Janata Lunch Home

Where: 78 A, Pali Naka, Dr Ambedkar Road, Pali Hill, Bandra West
Cost for two: Rs 900
Rate of a pint: Rs 120 (approx)
Toto's Garage

Where: 30, Lourdes Heaven, Pali Junction, Pali Hill, Bandra West
Cost for two: Rs 1,000
Rate of a pint: Rs 150 (approx)
Yacht

Where: Near Bandstand & St Andrews Church, Hill Road, Bandra West, Mumbai
Cost for two: Rs 500
Rate of a pint: Rs 200 (approx)
National Restaurant & Bar
Where: Rameshwar, SV Road, Santacruz West, Mumbai
Cost for two: Rs 500
Rate of a pint: Rs 120 (approx)
Gokul

Where: 10, Tullock Road, Apollo Bunder, Colaba, Mumbai
Cost for two: Rs 500
Rate of a pint: Rs 90 (approx)
Sunlight Restaurant And Bar

Where: Ravindra House, Kalbadevi Road, Near Furtados, Dhobi Talao, Kalbadevi, Mumbai
Cost for two: Rs 500
Rate of a pint: Rs 90 (approx)