Renaissance lounge breakfast was actually good when we stayed there and consisted of everything we needed: egg dishes to order, bacon, sausages, ham, potatoes, jams, cereals, yogurt, salads, Thai dishes, soups, congee (Khaotom), dumplings, fruits, breads, lox, pastries, and drinks such as tea, coffee, cappuccino, juices, etc.
They will let you check out at 4 PM depending on availability but you can always stay at the lounge until 5 PM or later. I have stayed at other Renaissance properties in other countries and I find this Renaissance to be the best. However, I find the Marriott 57 to be better than the Renaissance but personally prefer the Marriott Marquis Queens Park over all others.
Part of the breakfast spread at the Renaissance lounge
Our first stay at the Renaissance was in 2010 and we have had at least 50 nights at this property since. Our photo album of the Renaissance Bangkok is here:
https://www.flickr.com/photos/kalboz...81787891/page1