The Gianyar Night Market is found a little way outside the center of Ubud but it is well worth visiting if you are looking for something to do in the evening.
The night market is known for its delicious food and you will find a range of typical Balinese snacks such as satay, fried bananas, and dainty little cakes.
There is also the ubiquitous roasted suckling pig for which Bali is famous as well as other items for sale like clothes and toys.
(Source: https://www.thecrazytourist.com/25-best-things-ubud-bali)