Great use of Church crypt!
A group of 6 of us tried out Gremio on a Sunday evening about 7.30pm. Not many people there, though I couldn't decide if that was before the rush, or after it.
We had a wide variety of freshly-finished tapas - patatas bravas in a good hot sauce, gambas in garlic, calamari, croquetas, lentils with sausage, suckling pig, manchego cheese with tomato jam. All nicely prepared, looked good, and tasted good too; with a couple of bottles of respectable Spanish wine (Eduardo Berme at £23.50 each), it came out at about £44 a couple which was about right.
(NB:One of the Men's toilets had no door which made it a little more rustic than expected).