I am in Penang for five days and have found that there are several new clubs for dance/disco.The Soho Bar on the Penang Road has now opened the second floor and is still very busy.Just along the street past the garage across the road is a whole new section of bars and cafes.The big night club is called "Slippery Senoritas" and was playing techno style when I walked past.
A little further on is a great place to have eats (needed a break from curries).It is called "Gloria Jeans Coffees" and does cheap breakfasts.(I paid 10Rgt) Coffee is included in the price.
My favourite watering place is still "20 Leith Street" which is less noiser but does happy hour prices from four in the afternoon to ten at night.
I agree with Steve. Penang is a good place to chill out for a Visa run.