How long you going for? if you don’t fancy a B&B or YHA you might be better letting a holiday cottage with that many of you..
Otherwise there’s loads of accommodation in Keswick with access to Patterdale along the Coach Rd or if you don’t mind a carry, up & over one of the passes like Sticks..
A cheap option is a camping barn, something like Stybeck Farm-
http://www.stybeckfarm.co.uk/accommod.htm#barn
Have a google for more.
In Patterdale- the White Lion Inn- http://www.patterdale.org/Whitelion.htm
Or the Patterdale Hotel (Good food inc deals) – http://www.patterdalehotel.co.uk/ are both good.
There’s a lot more going on in Keswick than Patterdale for 6-8 blokes though, all depends on what you want..