Where can I find a car wash that's open until at least midnight?
That is a hard one since most places close before midnight your best option is @GeoWash it closes at 11 p.m.
Where can I find Kumon math centers?
Depending on the age there is @Mathnasium also a good one is @The Math Club
Where can I find out what time Istiklal Mall opens on Fridays?
Just search their page next time to find out their hours of operation @Istiklal Mall or call them
Where can I find Mix Mobile?
@Mix Mobile this is the page for them with all their information and other helpful Tips, next time you can just search for it on Tip n' Tag
Where can I find the best club for a Friday night?
Check out @Sky Lounge they have a live DJ and good drinks
Where can I buy a JanSport backpack and for how much?
You can find them in a lot of places, which I could tell you but the price I don't know. I do remember however that during the back to school sale that @Readers were selling them but it cost around 50-80 JD
Where can I find a men's salon or barbershop that can do a gentleman's cut?
Check out @Nehad Dabbas Salon great place to get a gentleman's cut, check out their FB page and you will see they are a legit place
Where can I find a good CrossFit Box?
There is @Stone Hill Crossfit that I heard is great! You should go to all the crossfit gyms here and see what box you feel most comfortable at