Think the guestlist changes for different nights, it's +3 for Rock Nights.
I'm always a bit wary of door policies that turn people away based on what you look like. On one hand I can see the rationale - when I went to Pikes last year there were a group of quite young girls there, dressed to the 9's in heels, lip injections all round, posing on the beds taking selfies etc., not adding anything to the atmosphere. I spoke to one for a bit (she asked me to take a photo...) and they were perfectly nice, but I did wonder what they were doing at Pikes. That being said, the idea of turning people away because they don't have a certain 'look' doesn't sit well with me. If I turn up feeling nice, in the clothes I like, happy and ready to have a good time, and then got turned away because I didn't look hippy enough or edgy enough or cool enough then I'd feel pretty sh*tty.