I'm guessing that this refers to Carlton Hotel Baglioni Milan, which is one of the hotels under the Leading Hotels of the World （LHW酒店联盟集团) hospitality consortium ( www.lhw.com ). As such, all their offers begin with the word "Leading" (i.e. Leading In Advance, Leading Special Rate, Leading Extra Nights 5 for 4, Leading Suites, Leading Breakfast Inclusive, Leading Seasonal Offers, and so on)- http://bit.ly/1fFCOAG. It's the same for some other hotels under this group ( http://bit.ly/17VAbIl , http://bit.ly/1gewEoR , http://bit.ly/1c6wRtg )-- all offers begin with the word "Leading".

As this is a brand that doesn't seem to have a official Chinese translation apart from its initials "LHW"--or at least, it appears to be so when I did a quick Google check--IMHO, I suggest playing safe by just translating it as "LHW 套房“， ”LHW 早餐“. Alternatively, you could choose a Mandarin term which best brings out the meaning of "Leading" in this context. However, as a rule of thumb, I'm usually quite wary of translating brand names (or parts of it) that don't have official Chinese translations. I'll only translate a brand name upon approval from the brand guardian(s). The word "Leading" in this context goes beyond a dictionary definition--it is tied to part of a brand name.

Just my two cents.

--------------------------------------------------
Note added at 5 hrs (2013-11-26 13:34:28 GMT)
--------------------------------------------------

To the asker: You're right, I think "Leading早餐" works as well, since you are leaving the brand name untouched :)