Hi Energy, the Eight Immortals are a group of eccentric, fun-loving deities with a reputation throughout folklore as gods-about-town who embark on many strange and fantastic adventures. They are not commonly worshiped; it is more usual for them to be regarded as icons and depicted in statues, paintings, etc. as symbols of what they stand for.

They are, clockwise from top right in the picture below (start with the white-beared gentleman and end with the individual holding the fruit basket) - Zhang Guo Lao/張果老, Gao Guo Jiu/曹国舅, Lu Dong Bin/呂洞賓, He Xian Gu/何仙姑, Zhong Li Quan/钟离权, Li Tie Guai/李铁拐, Han Xiang Zi/韩湘子 and Lan Cai He/藍采和.



Zhang is more or less Dionysus - an immortal winemaker, whose brews confer longevity if drunk.

Gao was formerly a royal regent, wields a purifying jade tablet, and is a patron saint of actors, being fond of the performing arts and the theatre.

Lu is an exorcist (and ladies' man) who battles and dispels demons with the aid of his magic sword.

He Xian Gu is a protector of young women, particularly virgin girls (she was a vestal virgin herself). Nuturing and motherly, she was responsible for sheltering and raising the outcast royal baby who would later become the fearsome stellar deity, Marshal Yin (also known as Tai Sui - thereby hangs another story entirely).

Zhong is a former military commander turned alchemist, whose magic fan is said to transform base matter (such as stones) into gold if waved over it.

Li is pretty much Dr. House. A cripple who uses an iron crutch, he is a master healer who has a kind heart beneath his grumpy exterior and carries medicines of all kinds inside his magic gourd.

Han is a philosopher, a patron of musicians (especially flutists, being a skilled flutist himself) and a disciple of Lu Dong Bin.

Lan Cai He (whose gender is ambiguous, but is often depicted as female) is a trickster figure, a mischievous wandering musician renowned for her (his?) clairvoyant activity; s/he was known to sneak his (her?) predictions into the songs s/he sang. S/he is the patron saint of minstrels.

Greetings, Lowyat/Kopitiam goers.
I'm a lifelong Klang resident, and a long-time enthusiast/practitioner/student of Chinese folk religion and ritual activities (the 'sintua [神坛] scene', as some call it). I primarily associate with the Hell deities, such as Elder and Second Brother [大二爷伯, also known as the 黑白无常 or Black and White Ghosts], and Hell-related topics are where I am most knowledgeable; however, I do pray to several Heavenly gods, as well.
The sintua scene is so vibrant and widespread in Malaysia; I was thinking of starting a discussion thread about it here, so that fellow sintua buffs might be able to discuss this wonderful aspect of Chinese culture. A lot of misconceptions, ignorant beliefs, etc concerning the sintua scene have been going around; perhaps this thread can be used as an educational tool. I'm more than happy to answer questions, clarify facts and so on.
Pics related; the first is me at the temple I normally attend, and the second is me worshipping at home. Let's hear it from all the other sintua people here!