after reading a heap of the posts i notice allot of guys are great at opening clubs/bars etc but then revert back to less playfull stuff when using their number for the first time, be that call or text, so i thought i would share a little trick i have found super succsefull.
once you have got their number at said bar or club, if it is friday night i usually wait until sunday, you want them to think you have a life and things going saturday nights.
i never like to get too deep in text but save that stuff for in person so here is an opener i love using:
ME: "This is your serice provider. Your bill is now 128 days overdue, the ammount owing $1084. to avoid your bill being disconnected please following one of the following steps:
A) pay your bill immidaitly via BPAY
B) go to dinner with *insert your name*

this has worked for me everytime as my natural mood when i meet them is playfull
and example of the last response i got from this was:
HER: ahahah that was really cute, where are you taking me? p.s i got a fright as my bill is due right about now!! 
i found it invoked a feeling of releif like when you think you lost your wallet and you panic but then find it and your super happy about it.
anyway hope this helps at least one guy out there.
cheers
Tixx