People in Britain are spending about £300m a year on stag and hen nights, according to research.
Many hen and stag nights finish up in a nightclub
It suggests celebrations are becoming more lavish and lasting longer, with one in 10 costing £500 per participant.
Most stretch into a weekend of eating drinking and clubbing, with some men opting for a whole week of partying before their big day.
The study - for which 600 people were questioned - was commissioned by Teletext Holidays.
The research suggests nearly half of grooms-to-be enjoy a weekend away with their friends, with one in 20 men taking a whole week away. It also indicates that men spend twice as much as women on their pre-wedding celebrations.
Eating and drinking are still the most popular activities with many coughing up £250 for the privilege and one in 10 spending £500 each.
London, Blackpool and Edinburgh are the most popular destinations.
Other popular places for painting the town red include Brighton, Birmingham, Liverpool and Manchester.
The survey suggests that one in five stag parties end up at a strip or lap dancing club, while others involve tying the intended to a lamp post.
Marc Bell, director of marketing at Teletext, said: "Those of us who have been on stag or hen dos recently will have found that they are becoming more of a mini-holiday than a night out."