I'm not a big clubber but this place has to be seen to be believed. It's located in a rundown old tenement in the suburbs of Prague. When you arrive you're confronted with an entrance that looks like something out of a sci-fi movie - all shiny metal and whirling cogs. Inside some mad inventor has been at work, creating the most imaginitive interior I've ever seen using old junk. Moving mechanics, old seats from public transport and strange light shows are the order of the day. It's a visual spectacle and a half. My favourite bit is the lights made out of old lemon squeezers.
Cross Club Plynární 1096/23, Praha 7
Not far from Holesovice metro station
www.crossclub.cz/
If you're travelling in the Loire Valley, plan to visit the chateaux at night as many have light spectacles. At Blois on Wednesdays, it's in English. On July 4/5 over 2,000 candles are lit in the grounds of Villandry and Azay-le-Rideau has a wonderful show most evenings.
They don't start till late (sunset 9.30pm) so, if you have kids, eat somewhere late then visit, most of the nearby villages have bistros. Chenonceau has musicians roaming and night lights. Other events can be found below.
For other events in the area see: www.myweekin.net