A subject as near and dear to my heart as only it can be for one whose primary food groups are comprised of caffeine, nicotine, alcohol and cholesterol--with carbs mostly eliminated but still barely hanging on.
Some hotel chains are drinkable: Doubletree (Cafe Valet), Westin (Starbucks, which I generally avoid due to its high caffeine, but for hotel stuff its better than much of the rest), Renaissance and Hyatt are all at least acceptable, although none are better than fair. I probably like the Hyatt coffee best.
In the realm of the truly undrinkable are Sheraton at the head of the pack with Maxwell House (the abject worst). Other undrinkable chains include Holiday Inn, Marriott, Best Western, Hampton Inn and so forth.
When I hit a 'drinkable' location, I bribe, cajole, con, connive or purloin an ungodly amount of extra coffee paks from the housekeeping staff. Then when hitting the road on subsequent trips booked into locations rated undrinkable, I pack several drinkable coffee packs into my suitcase.
I call this 'defensive coffee' (a first cousin to 'defensive eating'--i.e. when you know you're going to be served a lousy meal at a get together, eat heartily about two hours earlier, leaving just the barest modicum of appetite for when you arrive at the detested degustation).
For hospitality locations without a coffee maker (generally the most upscale), having been repeatedly abused with 24 hr room service coffee 'on demand', which generally means slow, cold and old, I have a 110/220 Volt Brookstone sourced travel unit my wife bought me to ward off those $7 a cup coffee charges at Asian hotels. Which with my 24 oz morning habit equates to $35 daily, in light of the fact that we're talking 5 oz cups.
The problems with the Brookstone unit are several:
1. Delay: It always causes a search at security.
2. Packing: Its as big as one of my shoes, so it takes up room.
3. Usability: You have to clean carefully it with cotton bathroom towels, tissues and hot water after each use.
4. It only makes 11 oz at a time.
On the up side, the coffee is good, and its on demand. Strangely enough, its highestest use is for boiling water for evening mint tea.
As was noted above, hotel room coffee units are never clean, and no matter how many pots of straight water you run through, the heated 'plain' water always tastes like what you rinse from a dirty coffee pot. Still on the subject of evening tea, a room with a microwave is actually best!
Other: hotel room mugs are always cold. Pre-heat the mug with hot tap water AND place the mug on top the coffee maker which will heat it even more.
Chicago is my spiritual chow home