If you think that a bride and groom wedding shower would be appropriate, run the idea by the couple themselves first. Getting their input will help you develop a suitable guest list for the shower. If you don't have a large home consider holding the bride and groom wedding shower at a local park or their favorite restaurant.
A Shower for the bride and groom is normally centered around a theme, make sure the theme you pick will be suitable for both the male and female guests. You want everyone to feel comfortable and at ease. Keep in mind many men are not comfortable dressing up. You may want to stick with a casual theme in this case.
Plan a menu for the bride and groom wedding shower, if going with a casual affair a pot luck offers a great alternative. Everyone brings along something that they like to eat and drink so all taste buds are accounted for. Plus a pot luck is a wonderful way of keeping down the costs.
Before planning any games for the wedding shower, take into consideration the personalities of the guests, no one wants to be made to feel uncomfortable. If you choose a couple of games make them simple and fun with no way of embarrassing anyone.
When it comes time to open the gifts at a bride and groom shower, the male guests may only be interested in watching the groom open his gifts. Provide an alternative activity for them while the gift opening is going on. It can be something as easy as watching a sports event on TV.
When sending out the invitations, make sure to provide full details of when the shower begins and ends. Many guests don't want to have to stay for hours on end and are more likely to accept the invitations when set times are provided.
As you will be inviting males to the bride and groom wedding shower and they traditionally don't like to shop for gifts, a helpful idea is to include a wish list for the bride and groom. Provide them with small list of shower gifts that are easy to find, the men will be thankful for the help.
As a bride and groom wedding shower is more of a couples event, try not to invite any single guests that might feel uncomfortable. You definitely want to invite the members of the bridal party though.
Some great theme ideas for a joint groom and bride shower would be a Jack and Jill type of event, a gardening shower or even a stock the workshop and fridge event, prompting gifts for both the bride and groom individually. No matter what theme to choose keep it simple and light hearted, everyone will have fun and feel more relaxed before the big event.