London · Edinburgh · Glasgow · Bristol · Cambridge · Oxford · Preston
Dublin
Paris · Lille · Annecy
Florence · Venice · Trieste
Bilbao · San Sebastián
Lisbon
Berlin · Heidelberg
Brussels
Amsterdam
Geneva
Vienna
Oslo · Trondheim
Stockholm · Gothenburg
Copenhagen
Ljubljana
Zagreb
Budapest
SF / Berkeley · Boston · New York · DC
Antigua Guatemala
KL · Ipoh
A brainstorm of good hang-out activities you can do in pretty much any city: