Visited Levant on a Friday night - tried to book from their website through TopTable (I think) which told me they had no space - but I took the extra step to call in, and the really helpful guy on the phone (it's a number which covers both restaurants, Levant and Kenza) booked me a table no problem within a couple of minutes.
Levant is a located off Wigmore Street actually on a little side alley called Jason Court. You descend about 2 flights of stairs (not sure if there are other accessibility options) to the bar area which doubles as a bit of a dance area (for some) and then a couple more steps into the main dining area which is probably about 50 tables.
The menu has a good selection of cocktails and wine offerings (ask them to go easy on the ice!). There were 4 set menu offerings from about £25 per head to about £45, which are primarily different by the main dish, baby grilled chicken, (essentially a mixed shish), salmon, or lamb (there was one more that you had to order 48hr in advance which I didn't pay much attention to).
We ordered from the à la carte menu, Tabbouleh, Halloumi, lamb Sambousek, cheese Sambousek, and Soujoc and a mains of Lamb (which came with salad and rice) and Chicken. Everything was really good - I can't fault anything - and the cost of £129 including a bottle of still water and 4 cocktails wasn't too prohibitive for London prices.
As you can see the set menu is definitely worth a look if you like the same main.
Service was really good, they were very much paying attention to where you were with your meal to bring the next course.
We didn't stay for the belly-dancer as we had another event to go to, but the party definitely felt like it was getting started as we left about 11ish with the DJ playing.
I highly recommend Levant from my experience.