So this place has been just up the road from me for a while now (were talking <2 miles!) and I've finally managed to check it out this afternoon:

https://www.arcadeclub.co.uk/

I went along with my two brothers. I thought it would be good but it exceeding all my expectations. Its awesome!
We spent about 4hrs in there but could easily lose 8hrs+ without even batting an eyelid.
There must be around 200 machines; far too many to list here, all dedicated cabs.
A few honourable mentions:
Hellfire, R-type, R-type Leo, Galaga, Raiden II, Bomb Jack, Outrun, Star Wars, Final Fight, Tempest, Super Off Road, Donkey Kong, Sega Rally, Point Blank 1 & 2, Mercs, Crazy Taxi, Soul Caliber, the list goes on...........

This was definately a hit with us and we can't wait to go back again.
Thouroughly recommended if you live in the north west.