Places that offer free WiFi in public

I'd like to make a list of all or most supermarkets, retailers and fast-food chains (calling them "restaurants" would be a bit insulting) that have free WiFi access.

Here's some:

• Sainsbury's

• Asda

• Aldi

• Tesco

• CeX

• GAME

• Clarks

• McDonalds

Update 16/02/2017 (Thanks to Agnes Faludi)

• Starbucks

• Costa

• Caffe Nero

• Emirates Airline Cable Car

• The Crystal

I'm not too sure if Burger King and KFC offer (going on assumption McD's does as I read it on Google) though I think some BK chains in London do offer free internet.

The ultimate point of this topic is to include as many shops that have this feature and let others know about it.

Thanks.