Other commenters are either full of shit or ignorant here. The basic rule for owners in a full-service building is tipping one month's maintenance split amongst the staff. Renters should take that rule of thumb and use that as their starting point.

A maintenance charge in a luxury full-service building in JC would be roughly $500-1000/mo, depending on apartment size and building quality, so take that $500-1000 number and adjust it accordingly based on how good the service is, what size apartment you have, whether any of the building staff went above and beyond in helping you over the year, and how much you use their services.