Actually Celebrity does not have a comparable perk in their program. The best reward I have found on Celebrity is the complimentary use of the spa facilities (thallasotherapy pool, sauna, steam room). If you are not Elite, you pay by the day or buy a package which is not cheap.
I must admit, I miss the Concierge Lounge when sailing on Celebrity. But, (as I am sure you are aware), there is no Concierge Lounge on the fleets older vessels. At this time, only the Voyager and Radiance class ships have one.