[trebleshot]

I don't think tipping should be mandatory or automatically included, simply because the tip should always reflect the level of service received (though I do understand the reasoning behind adding it in with parties of 8 or more). I certainly won't add to it, if I'm already forced to pay a tip even when service is bad.

For restaurants in general, I will start at 15% for the tip. The waitstaff's performance during the course of my meal determines if I drop down to 10% or go up to 20%. In very rare cases of extremely bad service, I won't leave a tip at all and will usually boycott that particular location from that point forward. Not the entire company, just that one location.

I'm the same as OV when it comes to tip jars, though I will usually tip the bartender on multiple occasions throughout a given evening. It really depends on the service level there.

I also will not tip pizza delivery people, since every single pizza place around me now charges extra for delivery services (which should cover the costs to get the pie to me). As for doormen, general delivery people, etc., I have so little interaction with those professions that I don't have any set rules about tips. Most of the time I don't tip, for the same reason MegaPrime33 mentioned about them doing their jobs.