For a long time I was buying coffee beans whole at the store and having the shop grind the beans for me. Needless to say I didn’t have a coffee grinder at home but I still wanted to get the freshest grind possible for my morning coffee.
Eventually I bought myself a great coffee grinder but when I travel I don’t usually take it with me… but that doesn’t stop me from grinding my own beans either.
See the best way to grind beans is to put them between to ceramic burrs. You can use a blade and it will work but the results will be less than stellar.
What I tend to do is bring a long a few plastic baggies with me and then place the beans in the baggies when I want to brew my coffee. I then beat them mercilessly with a rubber mallet, hammer, rolling pin, meat tenderizer, or frankly a big heavy book. You could even step on them if you wanted to stoop that far.
The point here is that if you don’t have access to a burr grinder then your next best bet is an uneven grind. You can get this from a blade grinder or just by crushing the beans by whatever means necessary.
Some people advocate using a blender or food processor but really if you don’t have a grinder then chances are you probably don’t have any kitchen appliances either.
Bag your beans up and give them a few good whacks. Yeah, the final coffee won’t be the best but I can assure you it’s going to be better than skipping your morning cup all together.