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How much do you think a club sandwich should cost? $12, maybe? $15?

Of course, much depends on where you are when you purchase this club sandwich. If you're in New York City, it'll cost you about $17.50, according to the 2013 Hotels.com Club Sandwich Index. But $17.50 is only a little more than half the price of the world's most expensive.

The index, Hotels.com said, uses this classic hotel staple as "a barometer of affordability." It canvassed the price of a chicken, bacon, egg, lettuce and mayonnaise sandwich across 840 hotels globally for the real price of the classic club.

(Editor's note: Until this moment, I thought a club sandwich was made with turkey, not chicken. Also, no egg. Anyone else?)

So where will travelers pay the most? Geneva, Switzerland, with an average price of $30.45. Geneva unseated Paris, the home of 2012's priciest club sandwich, to take the top spot. Paris fell to No. 2 with an average price of $27.45. In No. 3 is Oslo, Norway, at $26.72.

Ever wonder which cities are most expensive for room service? Click here to find out.

Prices in New York City, the only U.S. city to make the list, ranged from a hefty $27 at the 5-star renowned St. Regis New York to a more modest $7.95 at a 3-star property elsewhere in Midtown. New York City didn't even crack the top 10 for prices; it came in at No. 13.

Related: Room Service Ending at Largest NYC Hotel

The Top 10 Priciest Cities for a Club Sandwich:

1. Geneva, $30.45
2. Paris, $27.45
3. Oslo, $26.72
4. Stockholm, $23.12
5. Copenhagen, $22.33
6. Rome, $22.26
7. Tokyo, $20.70
8. London, $20.65
9. Sydney, $20.53
10. Hong Kong, $19.80