One of my favorite spot for one of Malaysia's claim to fame - Nasi Lemak dish! Definitely not a place to go for "vibes" but if you do not mind eating at an alley between buildings that does not look hygienic, you are in for a treat!
Outdoor dry and wet market that is very fun to experience, a change of experience for those that grew up shopping in groceries shops for groceries. There are lots of places and interesting older building to walk around and experience.
If you enjoy some biryani, this place has amazing biryani with plenty of other Malay dishes to try as well.
This is a great place to visit for some coffee. Generally there are plenty of coffee/tea shops to visit. A few others that are good are Louver Brewer, Wooden Box, 9% Coffee, Chagee, Rengit Coffee, Aoberhang...
A place to go to when the weather gets too hot, there are food, clothing shops, grocery shops...to visit