For me it always depended on the players.
I was in several great bar bands that essentially operated where we took home a 'work-up tape' for next week. You learned your part, they really did learn theirs. Got to the gig, everyone's 'radar' warmed up, and we'd work in those tunes (usually 3 or 4) thru the night, and it worked fine. After some months, you had a playlist long enough for two nights or more. Handy and relatively painless.
I was in a couple 'we gotta rehearse all the time' bands. Some of them needed to woodshed 25 hours a day (still wouldn't help . . ), and we didn't gig a lot, so 'the nerves' would set in while the leader was going thru his Rolodex of tunes, and he'd invariably call a lot we NEVER rehearsed. Brilliant . . . . In a way, it seemed like weaker players always wanted to rehearse a lot more: Confidence issues maybe, stage fright (which has never happened to me), who knows?
Then there's always the band where (insert name here) where ONE guy was always drunk/high, insisted he played WAY better that way. Next . . . or my particular favorite: I can't drink (I get real sick real fast) and I was always afraid of drugs, so a few times, I was the ONLY straight person on the gig, and I'd let go as I wouldn't 'party' with them. Puh-leeze . . . . only to be replaced by a user who couldn't even tune his axe. Did wonders for my confidence.
But then on the other hand, I got more than a few gigs where they'd 'had enough' of the drunk I was replacing. In one case it was a real gas, as it was a great band (save for that guy), they knew their stuff backwards and forwards, and I knew the tunes already, so it was really 'plug and play', so I guess the pendulum would come back to be from time to time. But then again . . . he was picked up by a nationally touring artist (who he's still with, but they're all big-time abusers). Whaddya do ?
Most bands I was in, we all had 'day jobs', so really that cut down on rehearsing more than anything. Had I had more chances to only play, I was never averse to rehearsing IF it was positive and everyone had their 'game face' on.
Plus anymore, I've completely and utterly lost any desire to ever play in a bar again. Ever. My 'want to' has been eclipsed by 'I'm breaking this axe over the head of the first $R$^@# that gets in my face'. I honestly don't trust myself not to go ballistic and start drumming heads or anything else I can get a piece of, so it's just not an option ever again. I'm way too old to get thrown in jail for a bar fight.
So I suppose Nature has run its' course. It seems the ironic thing is all I actually do is rehearse anymore, playing around the house. But then, I never have a drunk guitar player to hassle me, and the ice machine doesn't make any noise !
Joey