This sort of thing is heavily dependent on your travel destination. People traveling from 3rd world to first world destinations often get this kind of scrutiny, especially in the US and Canada, but for many places it's simply not an issue, especially when traveling to culturally and economically similar countries. Many latins do this frequently, for example, in order to accumulate passport stamps showing a reliable history of returning to their home country, as this increases their probability of getting a travel visa to North American destinations. People from first world countries going to other countries that aren't the US usually don't get asked anything at all along those lines. Really and truly for general purposes it's only an issue for traveling to the US and to a lesser extent some European destinations. Political climates are variable and change with the blowing winds as well, so of course nothing is constant, as we're all painfully aware these days.
Yes, many countries do have "guides", someone with local knowledge who for a fee will guide you around town. They are also sometimes owners or agents for rental properties that cater to mongers. They're not usually girls though. They're usually guys who know the scene and who will take you around to show you the "best" venues and acclimate you into the local way of doing things. They may also help travelers avoid some local petty scams if they aren't the scammer themselves. Guides should be vetted carefully by getting input from reliable sources as to their trustworthiness before you ever engage one.They often have extensive contacts and will also recommend the "best" girls. They will also direct you to "reliable" drivers and "good" restaurants. I use parentheses around all of the descriptions because all of these locations and services frequently vary by guide. They charge too much to people who don't know any better or who don't know how to explore themselves, and they heavily favor clubs and girls who provide a kickback to the "guide". Typically these guys are targeting new travelers who don't have the knowledge or experience needed in order to navigate themselves, especially in areas where language is an issue. These guys are not always expert except in the most general way about tourist attractions as well. What they will do that's of benefit to travelers is to save them time learning to navigate areas, because it can be challenging finding some locales, as well as introducing them to people and places which helps greatly with the comfort factor for newbies. Also, they may group together guys, such as on an MP tour, who can become fun wingmen to hang with. In some places local expats (rather than guides, not expats working as guides)will enjoy taking newbies out on MP and club tours simply for the cost of beers, and the fact that the MPs may throw them an occasional freebie for bringing guys by. This is usually a better option if available. If there's a ground zero bar/hotel where you're traveling to then there's almost always someone like that. There are not many girls that specifically do this in set places, although any working girl will be happy to squire you around town and show you the sights in return for shopping and a session later. For local stuff the guides I was describing earlier can easily set you up with someone to take you around. They will always tell you the girl is a local expert. Most of the time it's just a local girl with local knowledge rather than an expert tour guide. They're usually more expert at the sex stuff. lol. Girls that are actually traveling with you as you tour fall right back into the earlier discussion about traveling with strangers and generally are not recommended for the reasons described above.
As for your personal safety you should never entrust that into the hands of someone else. Being wary of drugged drinks and situational awareness for personal safety is always your personal responsibility, not that of the guide, and should never exceed your personal comfort factor no matter what the guide says. As for getting party favors well, there's a large inherent risk in that as I'm sure you're aware, but since I don't do that myself I'm not the best person to give advice on it, lacking experience, so I'll defer to others who know better than I do.
