Research reveals over 30 per cent of British grooms are now put off raucous boozy events because of the rising cost - and the fear of being humiliated.
Studies by LateRooms.com found the average Hen or Stag do now costs £300 per head as Brits find increasingly elaborate ways to celebrate their last days of freedom.
But it says over a third of men tying the knot think that is too much - and are also put off by the odds of being chained to lamp posts or handcuffed to bus stops.
Many would now prefer to have a spa day and a relaxing facial, massage and meal instead of a pub crawl or mega drinking session.
The research reveals a clear gender divide with people attending Stag dos spending £346.19 on average, compared with those attending Hen dos, who will spend £286.96.
Stags were also more likely to splash out, with a smaller percentage (6%) admitting to spending over £1,000 on their mate's final blowout.
Foreign trips with adrenaline-filled adventure elements - such as quad biking or paintballing - are top of the stag party agenda (56%), while for Hens indulgent relaxation activities - such as a spa break or cocktail making classes - were more likely (73%).
But half (50%) of those attending Stag or Hen dos admitted that they dread the event, with their top fears including overspending at the event (38%), drinking games (33%) and being humiliated (32%).
Over a third of men revealed that they would happily swap typical stag activities such as zorbing or go-karting for a relaxed meal or even a spa break (38%), while a far greater number of women responded that they would much rather be doing something more adventurous on a Hen weekend (60%).
LateRooms.com spokeswoman, Andrea Tarpey, said: "Wedding bookings for hotel rooms will surge this weekend as invitations for popular June and July dates hit people's letterboxes.
"As well as the big day itself there are the all-important stag and hen parties to plan.
"We hope our cheeky reminder will prompt wedding goers to not leave their accommodation booking till the last minute - but to book early and shop online for the best deals."