The lead guitarist in my current band (along with other members of his former band) is being inducted into my state's Rock and Roll Hall of Fame, and as part of the ceremony they will be playing a 6-song set. Other bands are also being inducted at this event and will each be playing a short set as well. The band's original bassist can't participate due to health issues, and the band has a couple of other former members who have said they could play bass for the gig (even though bass isn't their main instrument) but they live in other parts of the country so they couldn't do any rehearsals. So my LG asked if I would play bass for the rehearsals and in the meantime he's gonna try and get the BL to just use me for the actual gig as well... but no guarantees. PROs 1) A (potentially) great chance to increase my network and get "exposure" as a bassist 2) Would help out my LG (who is also a pretty good friend of mine) 3) Rehearsal commitment wouldn't be extensive (2 sessions of 3 hrs each). Songs are all covers (most of which I've played before in other bands), so shouldn't be a lot of shedding time required. 4) Could be a nice high-profile gig (IF I get to play it); full P.A., lots of publicity, huge attendance by current and former area musicians, etc. CONs 1) No guarantee I'll get to play the ceremony... may be rehearsal time spent for nothing. 2) No pay (for either rehearsals or the ceremony if I should play it). 3) LG says several of the members haven't played for a LONG time, and the only rehearsal we'll get with the full band would be a couple of nights before the show. If I play the set with them and it doesn't go well is it my reputation on the line? Thoughts? I'm leaning towards doing it but wondering if there are any red flags I haven't thought of. Thanks in advance.