Don't know if you've even been there before but LV is the capital of fun. Casino floors have no clocks around, so 24/7 whatever you do. But don't get caught drunk along Las Vegas Blvd, their drunk tank is not very friendly. Things usually start up after 11 or 12. If you can get into a private party, better still. Though probably have to pay a get in fee. If you buy drugs, careful some bad stuff still out there. Pot's probably your best choice. Buying blow from this guy who seems OK...don't.
Weekend hookers come up from SoCal by the car loads, but prostitution is not legal in most of Nevada. Make up your own mind. If you met someone who you really think likes you..usually a hooker (male or female). Bail bondsmen ad's all around, from bus stop benches. etc, etc, etc.. Hide your passport at all times. If they have a Irish consulate in Vegas, might want to get their number...just because. Check out the Hard Rock museum than the pool. The pools not as bad ass as a few years ago, but still...women. women. women.