I second what herbert says about discount, for example 10% at millets & blacks, and a big 15% at cotswold, many others, but not all outdoor shops, just ask.
with the scottish system you can you can pay for 1 nights membership for £1, (as well as the nights fee) to try it out, or if you are going to use them less than 8 times in a year. You still get a card so can flash it for discounts, well worth trying one out.
Try out the glencoe one on a sat night, just a 20 min walk to the Clacgaig Inn, with great live music, crack, & beer. no twin rooms though unless you pay more for a bigger room to yourselfs (i think you can do that)