I will be there in July as well trying to find a good hotel near the SOHO area. I booked a few nights at the W Leiceister Sq. but the rooms look strange with bathrooms in the middle and I am not sure of the views. I may stay at the Hilton a few nights. I have not noticed the Doubletree on a map yet.. I need to look that up.
I love Heaven. Fav club in the world by far. If you find a better club then let me know!!