Did it quite a few times for a 3 day retreat Thai monks visit KL
8 precepts not hard, just addition of 3 precept from the usual 5 which includes
1) No meal after lunch, as in full solid meal like rice meat etc., so what i usually do when i feel a bit of hunger pang is to drink milo / cereal drink which is provided
2) No entertainment, beautifying or using perfume etc
Quite easily done since the main time in retreat is used on meditation and developing oneself
3) refrain from lying on a high or luxurious sleeping place
Just remove the mattress from the bed and lay the mattress on the floor, easily done

Btw I am new to this tered, anyone here interested in Tibetan Buddhism/ Vajrayana?
I am finding myself very curiously attracted to it

yeap got 3 days retreat... its a more simple and suitable one for the laypeople who are still not really cut off from the worldly concerns
actually i think it all depends on which association organizing the retreat and what are the ground rules for it, i went for 3 days from friday night to sunday evening
usually i think 7-8 days are more suitable for retirees who have more free time unless you are the type who are firm and ready to walk on the Path

Hi, sorry for the late reply.
One of the place I know of would be Subang Jaya Buddhist Association, usually some Thai Monks will be here for 3 days to teach a short meditation retreat for once every 3-4 months.
Usually in retreats, male and female are separated into different dormitory/ buildings during the retreat course.

It's not profit making, however you're free to contribute however much you want towards certain expenses such as air ticket for the monk etc etc.
I'm pretty sure there are also a lot more of meditation retreat conducted by various organizations, just need to look around for it

Btw, just sharing this video

have been watching a lot of his talks lately, also got the tickets to see his talk next month

For all those who are new/curious to what a typical meditation retreat is like, this is a much watch
Informative video talking on the aspect of mindfulness that even corporations and important people alike such as Google and US Congressman are practising

Yes, the resident monks are following Burmese tradition but sometimes there are visiting monks from Thailand/other countries who come to stay for a few days/ week to give dharma talk/ retreat.
Just last month Ajahn Brahm came over for a week to give guidance for the Nun's Novitiate Program