Yes, I guess it's pretty hard to play without Dan especially at first gigs, but I hope everything is gonna be OK
What as to me, I also listen a lot of rock/hard rock bands and some blues / new wave / funk stuff, but oldschool - if something new, than in an old "sound". From American rock I prefer Grand Funk Railroad with their hard rock, funk and soul bland (hope to hear a new album from them soon, wish to reunite with Mark Farner), and also Amboy Dukes, James Gang, Steppenwolf, Lynyrd Skynyrd, Blackfoot, Kansas etc. Also the Dutch rock scene is great - Golden Earring, Focus, Fitch, Alquin, Brainbox, Livin' Blues etc. Of course, I like lots of British bands - Deep Purple and all the 70s Co.
BTW, if you wanna hear some oldschool bluesy southern-style hard rock, listen to Govt Mule, it's a great band (relatively new, since 1995, but the sound is like 1972). Yeah, and BB King is always great. Especially his album with Eric Clapton which sounds pretty hard rock.
However I could never stand punk and alternative or hip hop. I'm a bit conservative in this. I prefer something with a melody, you know.
What as to jazz, I respect this style, but I don't like guitar jazz, only sax. Since I play guitar for several years, I just can't get, how terrifying it is to play a slow endless solo without chord riffs and when the tone and overdrive knobs are adjusted to 0. I mean, the person perhaps has to be extremely old to enjoy playing this.