Yep i could lets see in Rotterdam the main coffeeshop street is de nieuwe binneweg its really long and it has about 20 coffeeshops in it including the best rotterdam has 2 offer Pluto (great hazes NYCD Hashplant haze Xhaze and so on), de lachende paus a very big menu and they are all grade A stuff (means=the laughing pope) Sky high i'd recommend Bubblegum and edelweiss. and you have nemo the coolest looking coffeeshop ever and bob marley and out of time are good 2 and about the hardcore parties Nightmare in Rotterdam is coming up the 16th of december that is supposed 2 be the biggest and baddest party in Holland or something.
Desire and amigo also on the same street have great different types of hash (nepal libanon pollem super pollem afgany and so on) and you if you are looking for irish pubs you have paddy murphys with live music everynight and always a few irish around and o'sheas and they suck.... owyeah and on the same street as paddy murphy's you have a coffeeshop called the act with loud music and it has a club like vibe going on.
I hope i helped you out :P otherwise just say when u are comming over and i'll show ya tha spots myself and if nothing maked any sense that is prob. because im stoned rightnow