not in relation to facebook and getting booked, which appears to be the original moan of this thread ... FB has helped me a lot getting into the local music scene through snowball method, it's the virtual word of mouth, and in return has helped the bands I go to see.
I moved down just over 3 years ago for a job and without a clue what was going on. A new friend suggested I go and see one specific band, I liked them on FB, hence get invited to their next gig where I found out about two other bands. Go home find their FB page and if I enjoyed the gig like them on FB, get invited to gigs etc. A lot of bands over here put on gigs mostly for fun, playing their songs and hanging out together, not for fame or money. As some of them would not exist for longer than a couple of years building a professional website would be waste of effort. They stay together, split up, reform and, as mentioned above FB helps with the whole DIY thing together with soundcloud or bandcamp where many of them promote/sell their EPs.
Alternatively, just have a personal page on FB (ie band is represented by one person rather than a band page) link this up to your proper band page and befriend all your fans/groupies on FB. They have the benefit of getting invited to gigs, receiving updates from a friend but you can still use your proper page for promotion.
I agree that FB is going down the drain but it still is a tool that you need to decide how you use it. If it's not for you, don't use it and stop moaning. Music was made before the internet took over.
PS, sorry, I may suffer from a bit from sleep deprivation at the moment but I just don't like moaners ;)