We're talking Anglo-Indian here, the vindaloo you can order in the curry houses was designed to be the hottest curry on the menu, it really doesn't have much to do with Goan dish at all.
I think you go to the lower class places for drunk people
Just kidding, at the places I've been which aren't many I do generally ask because I like very hot food and I've usually been told Jalfrezi or some special thing they've developed.
You should try the one I make it will blow your socks off lol