I hate to bring this up, but is Lyonaria's friend coming from the US? If so, <start lecture /rant>
I'd skip the pitiful excuses for bbq and burritos and enjoy something British. Take her to an eel and mash restaurant on the east end, or the 24 hour bagel place on Brick lane, or any of the Indian restaurants on brick lane, or fish and chips with a deep fried Mars bar. Make her eat some haggis!
However,I know deep in my heart that we sometimes just gotta do what the guests want, so no criticism meant for dear Lyonaria.
<\rant>
Isn't there a cirque de soleil show on these days?