Make no mistake about it, any film called Bachelor Party Massacre is going be naff, but, surprisingly, it's not as crud as it probably should be. The title tells you all you need to know: four buddies gather in an abandoned bar to celebrate their friend Addison's last few days as single. They drink, order pizza, letch after some strippers and get stalked n' slashed by a poncho-clad schizo woman who is nothing more than your common-or-garden asylum escapee.
There's plenty of topless girls on show, fleshed out lapdancing sequences and watery blood-flowage. The effects budget obviously hindered some of the creativity and so a lot of the murders are off-screen or skewered by strange camera angles; one girl gets a stiletto in the head and a guy has a knife shoved in the worst possible place.
As a collector and general advocate of slasher films - this was the 416th I've seen by my count - I'll watch almost anything like this. Some suck, some are pretty good. I'd slot BPM towards the bottom of the stack, but it's not downright awful as, say, Carnage Road or The Slaughterhouse Massacre, which are almost entirely devoid of merit.