An assman who takes every opportunity to denigrate any group of men he doesn't belong to writes this about musicians:

And if you thought that guys aren't trying to look tough or impress anyone at Starbucks, saving that preening instead for the bar that night, guess again. You can't get them to shut up about the deal they're supposedly closing, the gig that their loser band has, bla bla bla.

He may be obnoxious but he's also observant. Yeah, most people in bands take every opportunity to tell everyone where and when they're gigging. On one level ceaseless self-promotion makes sense, because the more people you bring in and the more drinks they buy the happier the bar owner will be that he hired you. Finding ways to stick your band into every conversation doesn't really work, though. That kind of behavior is only acceptable if it's a completely new band and you're a teenager. Otherwise it's annoying - it's a much better idea to talk about it a lot less than the average guy in a band does.

People who know you should know that you play in a band or a few bands, and you can occasionally bring it up when they ask what you did last weekend or if you "still play that violoncello or whatever it was". Never say how awesome it is that you get to play in some bar - act like it's no big deal. This is something I've heard NFL announcers say about rookie players scoring their first touchdowns and celebrating: "act like you've done it before". It doesn't matter if you play in public once every few months, make it seem like you do it all the time and you're not desparate for people to come see you. You can even "discourage" people from coming saying "that's a pretty small bar and it's always damn crowded when we play so to be honest you might wanna come to one of our other gigs instead". That makes it clear that you're successful enough to fill bars to capacity and gig regularly.

Now, sure, if you meet an attractive someone that you'll probably never run across again it's tempting to say "hey, wanna come to my band's show on Thursday?" but that translates into "I'd like to see you again but I'm a wuss who fears rejection and don't want to actually ask you out". It is a good way to evade outright rejection as few people will flat out tell you "no, I'm not interested in your shitty band" - they'll probably say "maybe" and then not show up or "I'd love to but I'm busy that night". Of course being a musician generally makes you more interesting, but don't act like it's your entire existence and you have nothing else going for you. Instead mention it obliquely, like "Wanna meet for drinks sometime next week? I'm pretty busy this weekend because I've got a gig to play with one band and a recording session with another".

If all this is sounding like something Roissy would say about demonstrating higher value and maintaining aloofness, yeah, this stuff works for picking up girls. A large subset of pickup artist skills, though, will also make your male friends think you're more interesting and worthy of respect. Some time ago Steve Sailer wondered if "Game" can be used to make guys think you're high-status and the answer is yes. As the always amusing Sergeant D wrote as part of a concert review:

Anyway, I've been seeing this girl and things are going well, so I'm turning my attention from chicks to making more friends that are dudes. The great thing about the Mystery Method is that it works with any group of strangers, not just the ladies! For example, I saw a three set of old hardcore dudes standing near me, and deployed my gambit. "Hey," I asked, "you guys look old and tired like me, how late is this show supposed to last?" I took it from there, looking for IOIs and threading to new material accordingly, and before long I had three new friends.

And even if it won't make your band (or whatever else it is that you can't shut the fuck up about) more successful at least you'll be a lot less annoying.