So I've planned my ultimate trip around the world on 3 of the top 1st class airlines. I'm trying to determine how much time I can spend in the lounges (to enjoy the amenities and save on hotel nights. ;-)

I've slept in the CX lounges in HK (private cabanas) but not sure if these other places have something similar for an overnight. I expect because I'm in the first class I'll have access to all the lounges but would like to know the following:

Can I do a day/night in SINGAPORE LOUNGES? I have a 9:00am flight. (A380 SUITE FROM SIN-LHR)

Can I do a day/night in Emirates Lounge in DBX (1st class from DBX to JFK)

Thanks for any tips!