Have you been on one? I don't mean 18-30 but the more, shall we say, cultured variety 
A good single friend of mine is in dire need of a holiday abroad and everyone else is loved up or skint. I'm both. I'd go with her but have ds1's French trip to fork out for, plus don't think dp would be too impressed 
I found one on Skyros that looks good, they do writing holdays etc..
Any advice much appreciated, TIA