איזה מזל שיש כאן קפה חינם במסדרון.

Literally, איזה מזל means what luck. In natural English, it often comes out as how lucky, what a relief, or fortunately.

So איזה מזל ש... is a very common pattern meaning It’s lucky that... or How lucky that...

Because ש־ means that and attaches to the next word.

• יש = there is / there are
• שיש = that there is / that there are

After איזה מזל, Hebrew normally uses this ש־ clause:

• איזה מזל שיש... = How lucky that there is...

יש is the Hebrew way to say there is or there are.

Hebrew does not need a separate word like English there in this kind of sentence. So:

• יש קפה = there is coffee
• יש אנשים = there are people

Notice that יש itself does not change for singular vs. plural.

Because מזל is a masculine singular noun, and איזה is the masculine singular form of which / what kind of.

In this expression, though, איזה מזל is best learned as a fixed phrase meaning how lucky or what luck.
Also, in everyday spoken Hebrew, איזה is often used very broadly, even where more formal Hebrew might use another form.

חינם means free, in the sense of free of charge.

In Hebrew, it is very common to put it after the noun:

• קפה חינם = free coffee
• כניסה חינם = free entry

You may also hear בחינם, as in קפה בחינם. Both are common, but the short form חינם is especially common in signs and simple statements.

Because קפה here means coffee in a general sense, not the coffee.

• קפה = coffee
• הקפה = the coffee

In this sentence, the speaker is happy that free coffee is available, not referring to one specific previously mentioned coffee.

Yes, both give location, but in slightly different ways.

• כאן = here
• במסדרון = in the hallway / corridor

Together they mean something like here, in the hallway.
So כאן gives the speaker’s point of view, and במסדרון gives the exact place.

In normal unpointed Hebrew spelling, it can look the same either way.

That is because:

• ב + מסדרון = in a hallway
• ב + ה + מסדרון = in the hallway

Without vowel marks, both are written במסדרון. Usually context tells you which one is meant. In this sentence, in the hallway is the most natural reading.

Yes, Hebrew word order is somewhat flexible, but this version sounds natural and clear.

איזה מזל שיש כאן קפה חינם במסדרון naturally builds like this:

1. איזה מזל = emotional reaction
2. שיש = introduces the reason
3. כאן = here
4. קפה חינם = free coffee
5. במסדרון = in the hallway

Other orders are possible, but this one sounds very normal in speech.

A simple pronunciation guide is:

eize mazal she-yesh kan kafe khinam bamisdaron

Approximate stress:

• EI-ze
• ma-ZAL
• she-YESH
• KAN
• ka-FE
• khi-NAM
• ba-mis-da-RON

A few notes:

• ח in חינם is the throaty sound like ch in Scottish loch or German Bach
• כאן sounds like kan
• מזל is ma-ZAL, with stress on the last syllable