It's spare, which isn't a bad thing, but given that your services are about fun and energy for small to medium sized crowds - well, the site doesn't convey fun or energy.
Further the site appears to be informational in nature, but doesn't appear to want to close the sale. Consider adding a big, "contact us about your event now!" or "ask us if we're right for your event!" button. This may not be all that important if the website audience is mainly people who already know who you are and just want more detail. If, however, you hope to catch people from google then you need to better define the flow of the website to draw them in and give them a quick and easy way to book a gig.
Beyond that, the rest of the stuff is behind the scenes - writing good content and updating it frequently, adding the appropriate things so that google and other search engines will send people your way, etc is just as important as the site design. I wouldn't bother going too far down the search engine optimization (SEO) path, but you should put some effort into that.