If you are looking for the BEST band in town, who can work the room, keep everyone on the dance floor, and professionally manage through even a difficult venue then STOP YOU HAVE FOUND THE BAND FOR YOUR WEDDING.
First, a word about the Hank La...ne's and other middle-men brokers. THEY ARE TRASH. You will sit through a 90 minute infomercial and be sold whatever spare parts of a band they have available that night at a HUGE mark up. DO NOT BOTHER. I can not understand why so many people lazily go to these outfits rather than doing a very basic amount of research to get a much better real band at a lower price.
Next, if you don't want my word for it, no problem: Ask to come and see the band yourself. They'll sit you in the front row at Cafe Wha and you can experience it yourself. For us, the only question left was price and whether they can replicate their awesome Greenwich Village act into a wedding venue. I'll leave the first part to you and your budget, but I can tell you the second part is a RESOUNDING YES.
Unlike many of the bands we spoke to, Cafe Wha has a professional manager (Hap) who handles all the bookings. The band leader, Ben, will speak with you a few weeks before your big day about all the specifications you want and special requests. On special requests, these guys can nail ANYTHING (including in our case a song with the groom). If you don't have a lot of specifications, that's OK too, they have a huge repertoire and can come up with the right feel to the evening based off your general likes or dislikes.
We had our wedding at the Weylin, in Brooklyn, which is a very difficult place to play acoustically; it has huge domed ceilings. The tech there told us NO ONE manages to navigate their acoustics like Cafe Wha band. If they can handle Weylin, I have to imagine they can easily handle anything.
In the end, Cafe Wha hit all the right notes at all the right times, from the cocktail hour, ceremony, and party time. Our guests were on the dance floor en masse the entire night and could not stop raving about the music. Do yourself a favor and at least go check them out, and skip the middle-men timeshare pitch from the band brokers.